Answer using C Assume the availability of a function named printStars that can b

Question

Answer using C

Assume the availability of a function named printStars that can be passed a non-negative integer n and print a line of asterisks. Write a function named printTriangle that receives a non-negative integer n and prints a triangle of asterisks as follows: first a line of n asterisks, followed by a line of n-1 asterisks, and then a line of n-2 asterisks, and so on. For example, if the function received 5 it would print:
* * * * *
* * * *
* * *
* *
*

The function must not use a loop of any kind (for, while, do-while) to accomplish its job. The function should invoke printStars to accomplish the task of printing a single line.

Explanation / Answer

#include<stdio.h>
int printTriangle(int);
int printStars(int);

main()
   {
   int n;
   printf("Please enter a number: ");
   scanf("%d",&n);
   printTriangle(n);
   return 0;
   }
  
int printTriangle(int n)
   {
   if(n == 0)
       return 0;
   else
       {
       printStars(n);
       printf(" ");
       printTriangle(--n);
       }
   }
  
int printStars(int n)
   {
   if(n == 0)
       return 0;
   else
       {
       printf("* ");
       printStars(--n);
       }
   }

If you have any confusion or any query, please leave a comment, I’ll try to explain in more details.

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