UNIX Utilities III: Yes

This isn't a hugely popular program, but it does have its uses: the basic "yes" command, simply repeats whatever you put in to it, over and over and over again. This can be handy for things like testing buffering on a new shell you're developing.

Note that the usage is incredibly similar to echo, but simply provides it in a for loop:

/**
 * A utility that emulates the UNIX command "yes", repeating the input
 * until killed.
 * 
 * Used in places like Jurassic Park (the movie) when Nedry leaves a 
 * trap that outputs the string "You didn't say the magic word!" over
 * and over.
 * 
 * Copyright 2011-12-23 Joseph Lewis <joehms22@gmail.com>
 */

#include <iostream>

using namespace std;

int main(int nargs, char* vargs[])
{
 string s;
 
 for(int i = 0; i < nargs - 1; i++)
 {
  if(i != 0)
   s += " ";
  s += vargs[i + 1];
 }
 s += "\n";
 
 while(true)
 {
  cout << s;
 }
}