Factorial in C++

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Q.Write a C++ program for Factorial Number.

#include <iostream>       
using namespace std;
 
int fact(int a){  
    if (a==0 || a==1){  
        return 1;  
    }  
    else{  
        return a*fact(a-1);  
    }  
} 
int main()
{ 
    int n;
    unsigned long factorial = 1;
    cout << "Enter the factorial number : ";
    cin >> n;
	factorial= fact(n);
	cout << "Factorial of " << n << " " << factorial;
	return 0;    
}
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Q. Write an algorithm to Factorial Number.

1. Start
2. Read integer `n`
3. Define function `fact(a)`:
   - If `a` is 0 or 1, return 1
   - Else, return `a * fact(a - 1)`
4. Call `fact(n)` and store result in `factorial`
5. Print "Factorial of n is factorial"
6. End
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