The realization of the strcmp of the C language of the evil complement

strcmp () function description

The corresponding characters in the two strings are compared in the order of the ASCII table, and 0 is returned, and the subtraction is returned by different values.

set these two strings to STR1,STR2,

if STR1==STR2, returns 0;

if STR1>STR2, a positive number is returned;

if STR1<STR2, a negative number is returned.

Note: Different compilers have different rules for return values

int strcmp (char* str1, char* str2) {

while (*str1 && *str2 && *str1==*str2) {

++STR1;

++STR2;

}

return *STR1-*STR2;

}

The realization of the strcmp of the C language of the evil complement