strstr函数的用法_c find函数返回值_strchr函数(2)

* SYNOPSIS

#include <string.h>

int strcmp(const char *s1, const char *s2);

int strncmp(const char *s1, const char *s2, size_t n);

* DESCRIPTION

The strcmp() function compares the two strings s1 and s2.

It returns an integer less than, equal to, or greater than zero if s1 is found,

respectively, to be less than, to match, or be greater than s2.

The strncmp() function is similar, except it only compares the first (at most) n characters of s1 and s2.

* RETURN VALUE

The strcmp() and strncmp() functions return an integer less than, equal to,

or greater than zero if s1 (or the first n bytes thereof) is found, respectively,

to be less than, to match, or be greater than s2.

*/

  retval = strcmp( psrc, pdst);                                                                                                                 
    printf("[%s]-[%d]: retval = %d \n", __func__, __LINE__, retval);                                                                              
                                                                                                                                                  
    retval = strncmp( psrc, pdst, sSrcLen);                                                                                                       
    printf("[%s]-[%d]: retval = %d \n", __func__, __LINE__, retval);    

/* NAME

strcasecmp, strncasecmp - compare two strings ignoring case

* SYNOPSIS

#include <strings.h>

int strcasecmp(const char *s1, const char *s2);

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