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:
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:
C Programming Code Editor:
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C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
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