C program to print Floyd's triangle using recursion

#include <stdio.h>
 
void print_floyd(int);
 
int main() 
{
  int n, i,  c, a = 1;
 
  printf("Input number of rows of Floyd's triangle to print\n");
  scanf("%d", &n);
 
  print_floyd(n);
 
  return 0;
}
 
void print_floyd(int n) {
   static int row = 1, c = 1;
   int d;
 
   if (n <= 0)
      return;
 
   for (d = 1; d <= row; ++d)
      printf("%d ", c++);
 
   printf("\n");
   row++;
 
   print_floyd(--n);   
}

 Output

 Input number of rows of Floyd's triangle to print

4

1

2 3

4 5 6

7 8 9 10