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C Exercises: Find the factorial of a given number

C Pointer : Exercise-12 with Solution

Write a program in C to find the factorial of a given number using pointers.

Pictorial Presentation:

C Exercises: Pictorial: Find the factorial of a given number.

Sample Solution:

C Code:

#include <stdio.h>
void findFact(int,int*);
int main()
{
         int fact;
         int num1;
		printf("\n\n Pointer : Find the factorial of a given number :\n"); 
		printf("------------------------------------------------------\n");	
		printf(" Input a number : ");
		scanf("%d",&num1);		 

         findFact(num1,&fact);
         printf(" The Factorial of %d is : %d \n\n",num1,fact);
         return 0;
        }

void findFact(int n,int *f)
		{
        int i;

       *f =1;
       for(i=1;i<=n;i++)
       *f=*f*i;
       }
	   

Sample Output:

 Pointer : Find the factorial of a given number :                                                             
------------------------------------------------------                                                        
 Input a number : 5                                                                                           
 The Factorial of 5 is : 120

Flowchart:

Flowchart: Find the factorial of a given number

C Programming Code Editor:

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C Programming: Tips of the Day

How to format strings using printf() to get equal length in the output?

You can specify a width on string fields, e.g.

printf("%-20s", "initialization..."); 

And then whatever's printed with that field will be blank-padded to the width you indicate.

The - left-justifies your text in that field.

Ref : https://bit.ly/34DMOc3