C++ strcoll()用法及代碼示例

strcoll()是內置庫函數，並在頭文件中聲明。此函數將str1指向的字符串與str2指向的字符串進行比較。strcoll()函數根據當前語言環境的LC_COLLATE類別的規則執行比較。句法：

int strcoll(const char *str1, const char *str2)

參數：函數strcoll()將兩個字符串作為參數，並返回一個整數值。

Value                   Meaning
less than zero          str1 is less than str2
zero                    str1 is equal to str2
greater than zero       str1 is greater than str2

1. 小於零：當str1小於str2時

   // C program to illustrate strcoll() 
   #include <stdio.h> 
   #include <string.h> 
     
   int main() 
   { 
       char str1[10]; 
       char str2[10]; 
       int ret; 
     
       strcpy(str1, "geeksforgeeks"); 
       strcpy(str2, "GEEKSFORGEEKS"); 
     
       ret = strcoll(str1, str2); 
     
       if (ret > 0) { 
           printf("str1 is greater than str2"); 
       } else if (ret < 0) { 
           printf("str1 is lesser than str2"); 
       } else { 
           printf("str1 is equal to str2"); 
       } 
     
       return (0); 
   }

   輸出：

   
   

   str1 is greater than str2
   

2. 大於零：當str1大於str2時

   // C program to illustrate strcoll() 
   #include <stdio.h> 
   #include <string.h> 
     
   int main() 
   { 
       char str1[10]; 
       char str2[10]; 
       int ret; 
     
       strcpy(str1, "GEEKSFORGEEKS"); 
       strcpy(str2, "geeksforgeeks"); 
     
       ret = strcoll(str1, str2); 
     
       if (ret > 0) { 
           printf("str1 is greater than str2"); 
       } else if (ret < 0) { 
           printf("str1 is lesser than str2"); 
       } else { 
           printf("str1 is equal to str2"); 
       } 
     
       return (0); 
   }

   輸出：

   str1 is lesser than str2
   

3. 等於零：當str1等於str2時

   // C program to illustrate strcoll() 
     
   #include <stdio.h> 
   #include <string.h> 
     
   int main() 
   { 
       char str1[10]; 
       char str2[10]; 
       int ret; 
     
       strcpy(str1, "GEEKSFORGEEKS"); 
       strcpy(str2, "GEEKSFORGEEKS"); 
     
       ret = strcoll(str1, str2); 
     
       if (ret > 0) { 
           printf("str1 is greater than str2"); 
       } else if (ret < 0) { 
           printf("str1 is lesser than str2"); 
       } else { 
           printf("str1 is equal to str2"); 
       } 
     
       return (0); 
   }

   輸出：

   str1 is equal to str2
   

相關函數：strcmp()，memcmp()