Construct Pyramid of Numbers in c

#include<stdio.h>
#include<conio.h>

void main()
{
    int num,i,y;
    int 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();
}