Terminal Commands

[ButchCavendish]

Hi There,
I have to write a program which takes "ls" command (that displays the list of files in linux) as a command line argument..
I don't have any idea .. how to execute that.. Please Help Me.. Stuck at the following program
Thanks In Advance :)

#include <iostream>
#include <unistd.h>
using namespace std;
int main (int argc, char *argv[])
{
    int ret;
    cout<<"Displaying the list of files using ls as a command line argument\n";
    // I don't know what to do here
    ret= execl("/usr/bin/argv","list of files,o",NULL);
    if (ret == -1 )
        cout<<"failed\n";
    return 0;
}

[kbw]

Duplicate post. Please don't do that.
http://www.cplusplus.com/forum/general/175854/