Program in C to print numeric triangle

Write a C program to print the following triangle using function.

 1

 2 3

 4 5 6

 7 8 9 1

 2 3 4 5 6

Solution:

/*C program for number pyramid using function*/

#include<stdio.h>

void pyramid(int);

int main()

{

            int num;

            printf("Enter the number of rows : ");

            scanf("%d", &num);

            pyramid(num);

            return 0;

}

void pyramid(int n)

{

            int r,c,x=1,y=1;

            for(r=1; r<=n; r++)

            {

                        for(c=1; c<=r; c++,x++)

                        {

                                    if(x<=9)

                                                printf(" %d",x);

                                    else

                                    {

                                                printf(" %d",y);

                                                y++;

                                    }

                        }

                        printf("\n");

            }

}