How to print Floyd’s triangle in c ?

Question

Floyd's triangle is a right-angled triangular array of natural numbers, used in computer science education. It is named after Robert Floyd. It is defined by filling the rows of the triangle with consecutive numbers, starting with a 1 in the top left corner.
Please help me how should i print the following pattern using c language.

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15

Comments

What is floyd triangle...

Answer 1

#include <stdio.h>

int 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");
  }

  return 0;
}

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);   
}