system()

/* function system() example:
system() makes a system call. To say easily, if you use function system("Command_in_Shell") like this, your programme will give a Command_in_Shell command to your shell during running.
This example continuously makes a command "clear", so your screen will be cleared whenever the loop is made as if you command clear while you are on shell.
*/

#include <iostream>
#include <stdlib.h> //standard library header, this includes function system()
using namespace std;

int main(void){
    int input;
    while(1){
    cout << "This programme just get input and input endlessly, Input: "
    cin >> input;
    system("clear");}
}