stack operation created by arrbxr - https://repl.it/@arrbxr/stack-operation

stack operation.cpp

#include <iostream>
using namespace std;
void abc();
int main() {
  std::cout << "Hello World!\n";
  abc();
  return 0;
}

void abc(){
    int a;
    static int s = 3;
    a = ++s;
    cout<<a<<" "<<s<<"\n";
    if(a<=6)
    abc();
    cout<<a<<" "<<s<<"\n";
}