strcmp() 比较字符串的内容

strcmp() 比较字符串的内容

下面程序使用strcmp()验证答案是否正确：

     char   try [10];
    
    puts( " Who is 1+1? " );
    gets( try );
     while (strcmp( try ,"2") != 0 )
    {
        puts( " No,it's wrong.Try again. " );
        gets( try );
    }
    puts( " OK,That's right " );

下面程序说明各种情况下，strcmp()的返回值：

printf( " strcmp(\ " a\ " ,\ " a\ " )=%d\n " ,strcmp( " a " , " a " ));
    printf( " strcmp(\ " a\ " ,\ " b\ " )=%d\n " ,strcmp( " a " , " b " ));
    printf( " strcmp(\ " b\ " ,\ " a\ " )=%d\n " ,strcmp( " b " , " a " ));
    printf( " strcmp(\ " a\ " ,\ " c\ " )=%d\n " ,strcmp( " a " , " c " ));
    printf( " strcmp(\ " c\ " ,\ " a\ " )=%d\n " ,strcmp( " c " , " a " ));
    printf( " strcmp(\ " abc\ " ,\ " abd\ " )=%d\n " ,strcmp( " abc " , " abd " ));
    printf( " strcmp(\ " abc\ " ,\ " abcd\ " )=%d\n " ,strcmp( " abc " , " abcd " ));
    printf( " strcmp(\ " abc\ " ,\ " abbd\ " )=%d\n " ,strcmp( " abc " , " abbd " ));