Usage of strncasecmp and strcasecmp

Strcasecmp (case-insensitive comparison string is ignored)
Related functions: bcmp, memcmp, strcmp, strcoll, strncmp
Header file # include <string. h>
Define the int strcasecmp (const char * S1, const char * S2) function );
Function Description: strcasecmp () is used to compare S1 and S2 strings. Differences in Case sensitivity are automatically ignored during comparison.
Returns 0 if the S1 and S2 parameters are the same. If the S1 length is greater than the S2 length, a value greater than 0 is returned. If the S1 length is smaller than the S2 length, a value smaller than 0 is returned.
Example
# Include <string. h>
Main ()
{
Char * A = "abcdef ";
Char * B = "abcdef ";
If (! Strcasecmp (a, B ))
Printf ("% s = % s/n", a, B );
}
Run abcdef = abcdef
Note the difference with strncasecmp (). Do not confuse it. Strncasecmp related functions: bcmp, memcmp, strcmp, strcoll, strncmp
Header file: # include <string. h>
Function Syntax: int strncasecmp (const char * S1, const char * S2, size_t N)
Function Description: strncasecmp () is used to compare the first n characters of the S1 and S2 strings. The case difference is automatically ignored during the comparison.
Return Value: If the S1 and S2 parameters are the same, 0 is returned. If S1 is greater than S2, a value greater than 0 is returned. If S1 is smaller than S2, a value smaller than 0 is returned.
# Include <string. h>
Main ()
{
Char * A = "abcddfefekr ";
Char * B = "abcddfefekr ";
Printf ("% d/N", strncasecmp (a, B ));
}
It can also be used at the specified end and program entry.
Eg: If (! Strncasecmp (buffer, "quit", 4 ))
Break;
Eg: If (! Strncasecmp (buffer, "work", 4 )){
Printf ("Hello, world! ");
Break;
}