//===========================================================
//
//  Simple example program, illustrating how to read integers from
//     the input and from the command line.
//
//  Margaret Fleck
//  21 Jan 98
//
//  to compile
//    g++ -Wall -o simple simple.C
//  
//  to run, give it an integer argument, e.g.
//    ./simple 5
//    ./simple 13
//    etc
//
//  When program runs, it asks you to input a single character.
//  (Type ENTER after the character.)  It will then print
//  a block of characters whose width and height are determined
//  by the command-line parameter, surrounded by an ASCII box.
//
//===========================================================

#include <iostream.h>  // for I/O 
#include <stdlib.h>    // for atoi
#include <assert.h>    // for assert


// prints multiple copies of a character
// does not return any value (void declaration)
void print_N(char output_character, int number_of_repeats)
{
  int i;
  for (i = 0; i < number_of_repeats; i++){
    cout << output_character;}
}



main(int argc,char *argv[])  
  // argc is the number of items on the command line.
  // argv is an array of strings, one for each item on the command line
  {

   int input_width,i;     // integer variables
   char input_character;  // a character variable

   // argc is the number of items on the command line.
   // The first (argv[0]) is the command name (simple)
   // and then there is one real argument.  So argc 
   // should be 2.
   assert(argc == 2);

   // the first command-line input (argv[1]) is a ASCII string
   //   containing the digits of an integer.  atoi translates
   //   this string into an integer.
   input_width = atoi(argv[1]);

   // check that input number is valid
   assert (input_width > 0);

   // get character to put into box
   cout << "Type input character:";
   cin >> input_character; 

   // print top row of box
   print_N('-',2+input_width);
   cout << endl;
   // print interior characters and sides of box
   for (i = 0; i < input_width; i++){
     cout << '|';
     print_N(input_character,input_width);
     cout << '|';
     cout << endl;}
   // print bottom row of box
   print_N('-',2+input_width);
   cout << endl;
  }