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strcmp()

Compare two strings

Synopsis:

#include <string.h>

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

Arguments:

s1, s2

The strings that you want to compare.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The strcmp() function compares the string pointed to by s1 to the string pointed to by s2.

Returns:

< 0

s1 is less than s2.

0

s1 is equal to s2.

> 0

s1 is greater than s2.

Examples:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main( void )
{
    printf( "%d\n", strcmp( "abcdef", "abcdef" ) );
    printf( "%d\n", strcmp( "abcdef", "abc" ) );
    printf( "%d\n", strcmp( "abc", "abcdef" ) );
    printf( "%d\n", strcmp( "abcdef", "mnopqr" ) );
    printf( "%d\n", strcmp( "mnopqr", "abcdef" ) );

    return EXIT_SUCCESS;
}

produces the output:

0
1
-1
-1
1

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes

See also:

strcasecmp(), strcmpi(), strcoll(), stricmp(), strncasecmp(), strncmp(), strnicmp(), wcscmp(), wcscoll(), wcsncmp()

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