Write a function fact (int n) to find the factorial of a number n. Include a main class to find the value of s = n! /m! (n-m)!
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Step-by-step explanation:
#include<iostream.h>
#include<conio.h>
void fact(int n, int &facto)
{
int i;
for(i=1;i<n;i++)
facto*=i;
}
void main()
{
clrscr();
int n,m,fn,fm,a,fa,s;
fn=fm=fa=1;
cout<<"Enter a number : ";
cin>>n;
cout<<"Enter a number : ";
cin>>m;
fact(n,fn);
fact(m,fm);
a=n-m;
fact(a,fa);
s=fn/(fm*fa);
cout<<" Factorial of "<<n<<" = "<<fn<<'\n';
cout<<" Factorial of "<<m<<" = "<<fm<<'\n';
cout<<" Factorial of "<<a<<" = "<<fa<<'\n';
cout<<" s = "<<s<<'\n';
getch();
}
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