Construct Pyramid of Numbers

/* Write a C program to construct a pyramid of numbers. */

#include<stdio.h>

#include<conio.h>

void main()

{

 int num,i,y,x=35;

 clrscr();

 printf("\nEnter the number to generate the pyramid:\n");

 scanf("%d",&num);

 for(y=0;y<=num;y++)

 {

  /*(x-coordinate,y-coordinate)*/

  gotoxy(x,y+1);

  /*for displaying digits towards the left and right of zero*/

  for(i=0-y;i<=y;i++)

  printf("%3d",abs(i));

  x=x-3;

 }

 getch();

}