strcmp on char * compiles, but isn't working

Question

I am trying to break up a char by spaces, then perform some conditional logic, but using strcmp on the char * isn't working.

int main(void)
{
    char buf[64];
    char *cmd;

    // assign some space delimited words to buf...

    if (strcmp(buf, "somestring junk") == 0) { // this works
        // do stuff here
    }

    cmd = strtok(buf, " ");

    if (strcmp(cmd, "somestring") == 0) { // this doesn't work
        // do stuff here
    }

    return 0;
}

I've tried different variations such as "somestring " or "somestring\n" to no success. The code compiles without error or warning. The man pages for strcmp lead me to believe strcmp should work. What am I doing wrong?

Answer 1

It was not working because you have the cmd and buf mixed up in strcmp. The following code should work for you:

#include <stdio.h>
#include <cstring>

int main(void)
{
    char buf[64] = "somestring junk";
    char *cmd;

    // assign some space delimited words to buf...

    if (strcmp(buf, "somestring junk") == 0)
    {
            printf("First strcmp works!\n");
    }

    cmd = strtok(buf, " ");

    if (strcmp(cmd, "somestring") == 0)
    {
        printf("Second strcmp works!");
    }

    return 0;
}