// DRAW a DIAMOND
#include <stdio.h>
#include <stdlib.h>

#define TOTAL_ROWS 15
int main() {

  int row, col, numstars=1;
  int half, rate = 1;

  // Loop through each row.
  for (row=1; row<=TOTAL_ROWS; row++) {

     half= TOTAL_ROWS/2;
    
     // Draw the blanks before the stars
     for (col=0; col< half + 1 -numstars; col++)
       printf(" ");
  
     // Draw the stars
     for (col=1; col<= 2*numstars - 1; col++)
       printf("*");
      
     // If we hit the middle of the diamond, negate the rate.
     if ((numstars == (half + 1)))
       rate = -rate;
   
     // Change numstars by the rate
     numstars = numstars + rate;    

     // Go to the new line.
     printf("\n");
  }
 system("pause");
  return 0;
}