Thread: char* doesn't work as intended

I am quite new to C, and for some reason, I can't get this following program to work as intended. Can someone help me figure out why? Thanks in advance.

Code:

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

void foo(char* source) {
        char random[] = "random";
        source = (char*)strdup(random);
}

int main() {
        char* source;
        foo(source);
        printf("%s\n", source); //Should say "random"
        return 0;
}