47 lines
971 B
C++
47 lines
971 B
C++
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/*
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* C++ Program to Find Factorial of a Number using Recursion
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*/
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#include <cstring>
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#include <iostream>
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#include <cstdlib>
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#define ll long long
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using namespace std;
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/*
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* Find Factorial of a Number using Recursion
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*/
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ll fact_recur(int n)
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{
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if (n == 0 || n == 1)
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return 1;
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else
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return n * fact_recur(n - 1);
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}
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/*
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* Main
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*/
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int main()
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{
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int n;
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while (1)
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{
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cout<<"Enter interger to compute factorial(0 to exit): ";
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cin>>n;
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if (n == 0)
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break;
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cout<<fact_recur(n)<<endl;
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}
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return 0;
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}
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/*
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Enter interger to compute factorial(0 to exit): 10
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3628800
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Enter interger to compute factorial(0 to exit): 20
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2432902008176640000
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Enter interger to compute factorial(0 to exit): 15
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1307674368000
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Enter interger to compute factorial(0 to exit): 0
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------------------
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(program exited with code: 1)
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Press return to continue
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