##### Synopsis

    #include <string.h>
    int strcmp(const char *s1, const char *s2);

##### Description

strcmp compares the string pointed to by s1 to the string pointed to by s2. strcmp returns an integer greater than, equal to, or less than zero if the string pointed to by s1 is greater than, equal to, or less than the string pointed to by s2.

##### Portability

strcmp conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).