Floyd Triangle in C

This program prints Floyd's triangle.
No of rows have to be in the flody's triangle is instructed to give by the users.
Example Floyd's Triangle:
11
12 13
14 15 16
17 18 19 20
It's clear says that in Floyd's triangle nth row contains n numbers.

#include<stdio.h>
#include<conio.h>
 
main()
{
   int n, i,  c, a = 1;
 
   printf("Enter the number of rows of Floyd's triangle to print\n");
   scanf("%d",&n);
 
   for ( i = 1 ; i <= n ; i++ )
   {
      for ( c = 1 ; c <= i ; c++ )
      {
         printf("%d ",a);
         a++;
      }
      printf("\n");
   }
 
   getch();
   return 0;
}