'ls' Command Failed to Execute via C in Linux

Question

This simple program supposed to run the command ls but the output is 1 and 2.Can someone explain to me why ls not working ?

#include <stdio.h>
main()
{
    int pid,stat;
    if((pid=fork())==0)
      {
        execl("/bin/","ls",NULL);
        printf("1");
    exit(1);
      }
    else
      {
         wait(&stat);
         printf("2");
      }
}

Answer 1

Try something like:

execl("/bin/ls", "ls", (char*)NULL);
           ^^^^