How to use Call By Reference In C++
Below is the C++ program to find the factorial of a given number using call by reference:
C++
// C++ program to find the factorial // of a given number using call// by reference method#include<iostream>using namespace std;// Function to find factorial void factorial(int n, int *f){ int i; for(i = n; i >= 1; i--) *f = (*f) * i;}// Driver codeint main(){ int num = 5, fact = 1; factorial(num, &fact); cout << "Factorial of " << num << " is "<< fact; return 0;} |
Output
Factorial of 5 is 120
C++ Program To Find Factorial Of A Number
The Factorial of a non-negative integer is the multiplication of all integers smaller than or equal to n. For example, the factorial of 6 is 6*5*4*3*2*1 which is 720.
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