How to compare pointer to strings in C

Question

how to compare two strings in C? Help me, I am beginner@@

char *str1 = "hello";
char *str2 = "world";
//compare str1 and str2 ?

Those should be const char *.

dreamlax
– dreamlax

2010-09-08 00:23:45 +00:00
Commented Sep 8, 2010 at 0:23 — dreamlax
– dreamlax, Commented Sep 8, 2010 at 0:23

chqrlie · Accepted Answer · 2016-01-14 21:41:56Z

13

You may want to use strcmp:

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

int main(int argc, char **argv)
{
    int v;
    const char *str1 = "hello";
    const char *str2 = "world";

    v = strcmp(str1, str2);

    if (v < 0)
        printf("'%s' is less than '%s'.\n", str1, str2);
    else if (v == 0)
        printf("'%s' equals '%s'.\n", str1, str2);
    else if (v > 0)
        printf("'%s' is greater than '%s'.\n", str1, str2);

    return 0;
}

Result:

'hello' is less than 'world'.

edited Jan 14, 2016 at 21:41

chqrlie

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answered Sep 8, 2010 at 0:21

Daniel Vassallo

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1 Comment

dreamlax Over a year ago

+1, but I wouldn't link to that page, it uses the horrible outdated gets function in its example, which is definitely not a good idea for someone beginning C. The POSIX page is an alternative.

AndersK · Accepted Answer · 2010-09-08 00:19:32Z

5

if ( strcmp( str1, str2 ) == 0 )
  same

answered Sep 8, 2010 at 0:19

AndersK

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Comments

linuxuser27 · Accepted Answer · 2010-09-08 00:32:48Z

1

You can compare two char*s using the strcmp function.

edited Sep 8, 2010 at 0:32

answered Sep 8, 2010 at 0:19

linuxuser27

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