Where is error?

Question

#include <iostream>
using namespace std;
#include <cstdlib>
#include <stdlib.h>
int main()
{
cout<<"arash";
system("color 13");
return 0;

}

Answer 1

There is nothing wrong with your code.
It is only not completely supported by sololearn playground.
Try it in e.g. cxxdroid to See it working as expected :)