Sử dụng toán tử gán, chúng ta có thể gán giá trị cho các biến Show Dấu đẳng thức (=) được dùng làm toán tử gán trong C Ở đây, giá trị 5 đã được gán cho biến var Ví dụ #include int main() { int a = 10; int b = a; printf("a = %d \t b = %d\n",a,b); return 0; } chạy nó Ở đây, giá trị của a đã được gán cho biến b. Bây giờ, cả a và b sẽ giữ giá trị 10 Về cơ bản, giá trị của toán hạng bên phải sẽ được gán cho toán hạng bên trái Giải thích bằng hình ảnhToán tử gán hợp chấtNhà điều hành Nghĩa Ví dụ += L=L+R a+=b;giống như a=a+b -= L=L-R a-=b;giống như a=a-b *= L=L*R a*=b;giống như a=a*b /= L=L/R a/=b;giống như a=a/b %= L=L%R a%=b;giống như a=a%b Chương trình mẫuVí dụ #include int main() { int a = 10, b = 5; a+=b; // same as a=a+b printf("value of a+b = %d\n",a); // a will hold the result return 0; } chạy nó Chủ đề bạn có thể thíchCú pháp 2. Chỉ định nhiều nhất str_num ký tự của str bắt đầu bằng chỉ mục str_idx. Nó ném out_of_range của str idx > str. kích thước(). string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this CPPOriginal String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks9 string& string::assign (const char* chars, size_type chars_len) *chars : is the pointer to the array to be assigned. chars_len : is the number of characters to be assigned from character array. Note : that chars must have at least chars_len characters. Returns : *this.0 Original String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks3 Original String : Hello World! After assign() : GeeksforGeeks4 Original String : Hello World! After assign() : GeeksforGeeks5 Original String : Hello World! After assign() : GeeksforGeeks6 Original String : Hello World! After assign() : GeeksforGeeks7 Original String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks9 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this0 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this1 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this2 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____183 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____185 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____187 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____28 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this9 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this60 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____262
string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this63 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this64 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this65 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this66 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this67 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this2 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______360______361 Original String : Hello World! After assign() : GeeksforGeeks62 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______364 Original String : Hello World! After assign() : GeeksforGeeks65 Original String : Hello World! After assign() : GeeksforGeeks62
string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____28 Original String : Hello World! After assign() : GeeksforGeeks69 Original String : Hello World! After assign() : GeeksforGeeks0 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____32 Original String : Hello World! After assign() : GeeksforGeeks8 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______35 Original String : Hello World! After assign() : GeeksforGeeks6 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this63 đầu ra. string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this6 cú pháp 3. Gán các ký tự của chuỗi C cstr. Nó ném ra length_error nếu kích thước kết quả vượt quá số ký tự tối đa. Original String : Hello World! After assign() : GeeksforGeeks6 CPPOriginal String : Hello World! After assign() : GeeksforGeeks09 Original String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks3 Original String : Hello World! After assign() : GeeksforGeeks4 Original String : Hello World! After assign() : GeeksforGeeks5 Original String : Hello World! After assign() : GeeksforGeeks6 Original String : Hello World! After assign() : GeeksforGeeks7 Original String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks9 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this0 Original String : Hello World! After assign() : GeeksforGeeks19 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this2 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____622 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______624____365 Original String : Hello World! After assign() : GeeksforGeeks62 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____28 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this9 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this60 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____632
string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this63 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this64 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this65 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this66 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this67 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this2 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______640 Original String : Hello World! After assign() : GeeksforGeeks61 Original String : Hello World! After assign() : GeeksforGeeks62
string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____28 Original String : Hello World! After assign() : GeeksforGeeks69 Original String : Hello World! After assign() : GeeksforGeeks46 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____648 Original String : Hello World! After assign() : GeeksforGeeks8 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______35 Original String : Hello World! After assign() : GeeksforGeeks6 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this63 đầu ra. Original String : Hello World! After assign() : GeeksforGeeks Cú pháp 4. Gán các ký tự chars_len của mảng ký tự chars. Nó ném ra length_error nếu kích thước kết quả vượt quá số ký tự tối đa. string& string::assign (const char* chars, size_type chars_len) *chars : is the pointer to the array to be assigned. chars_len : is the number of characters to be assigned from character array. Note : that chars must have at least chars_len characters. Returns : *this. CPPOriginal String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks55 Original String : Hello World! After assign() : GeeksforGeeks56 Original String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks3 Original String : Hello World! After assign() : GeeksforGeeks4 Original String : Hello World! After assign() : GeeksforGeeks5 Original String : Hello World! After assign() : GeeksforGeeks6 Original String : Hello World! After assign() : GeeksforGeeks7 Original String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks9 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this0 Original String : Hello World! After assign() : GeeksforGeeks19 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this2 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____669 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____671 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______624____365 Original String : Hello World! After assign() : GeeksforGeeks75 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____28 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this9 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this60 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____632
string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this63 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this64 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this65 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this66 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this67 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this2 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______640 Original String : Hello World! After assign() : GeeksforGeeks61 Original String : Hello World! After assign() : GeeksforGeeks62
string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____28 Original String : Hello World! After assign() : GeeksforGeeks69 Original String : Hello World! After assign() : GeeksforGeeks46 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____648 Original String : Hello World! After assign() : GeeksforGeeks8 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______35 Original String : Hello World! After assign() : GeeksforGeeks6 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this63 đầu ra. #include int main() { int a = 10, b = 5; a+=b; // same as a=a+b printf("value of a+b = %d\n",a); // a will hold the result return 0; }8 Cú pháp 5. Gán số lần xuất hiện của ký tự c. Nó ném ra length_error nếu num bằng chuỗi. npos #include int main() { int a = 10, b = 5; a+=b; // same as a=a+b printf("value of a+b = %d\n",a); // a will hold the result return 0; }53 CPPstring& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this03 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this04 Original String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks3 Original String : Hello World! After assign() : GeeksforGeeks4 Original String : Hello World! After assign() : GeeksforGeeks5 Original String : Hello World! After assign() : GeeksforGeeks6 Original String : Hello World! After assign() : GeeksforGeeks7 Original String : Hello World! After assign() : GeeksforGeeks8 Original String : Hello World! After assign() : GeeksforGeeks9 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this0 Original String : Hello World! After assign() : GeeksforGeeks19 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this2 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____217 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____219 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______221____222 Original String : Hello World! After assign() : GeeksforGeeks62 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____28 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this9 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this60 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____632
string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this63 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this64 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this65 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this66 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this67 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this2 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____640 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this38 Original String : Hello World! After assign() : GeeksforGeeks62
string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____28 Original String : Hello World! After assign() : GeeksforGeeks69 Original String : Hello World! After assign() : GeeksforGeeks46 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3____648 Original String : Hello World! After assign() : GeeksforGeeks8 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this3______35 Original String : Hello World! After assign() : GeeksforGeeks6 string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this63 đầu ra. string& string::assign (const string& str, size_type str_idx, size_type str_num) str : is the string to be assigned. str_idx : is the index number in str. str_num : is the number of characters picked from str_idx to assign Return : *this02 Cú pháp 6. Gán tất cả các ký tự của phạm vi [beg, end). Nó ném length_error nếu phạm vi vượt quá nội dung thực tế của chuỗi. Gán trong lập trình C là gì?Thao tác gán sẽ gán giá trị của toán hạng bên phải cho vị trí lưu trữ được đặt tên bởi toán hạng bên trái . Do đó, toán hạng bên trái của phép toán gán phải là giá trị l có thể sửa đổi. Sau khi gán, một biểu thức gán có giá trị của toán hạng bên trái nhưng không phải là giá trị l.
Làm cách nào để gán chuỗi trong C?Khai báo một chuỗi cũng đơn giản như khai báo mảng một chiều. Dưới đây là cú pháp cơ bản để khai báo một chuỗi. char str_name[size]; Trong cú pháp trên str_name là tên bất kỳ được đặt cho biến chuỗi và size được dùng để xác định độ dài của chuỗi, i. e số ký tự chuỗi sẽ lưu trữ.
Làm thế nào để sử dụng += trong C?“+=”. Toán tử này là sự kết hợp của toán tử '+' và '='. Toán tử này đầu tiên cộng giá trị hiện tại của biến bên trái với giá trị bên phải rồi gán kết quả cho biến bên trái . Nếu giá trị ban đầu được lưu trữ trong a là 5. Khi đó (a += 6) = 11.
+= nghĩa là gì trong C?+= Thêm toán tử gán AND . Nó thêm toán hạng bên phải vào toán hạng bên trái và gán kết quả cho toán hạng bên trái. C += A tương đương với C = C + A. |