Assume the availability of a function called fact. The function receives an int

Question

Assume  the availability of a function called fact. The function receives an int argument  and returns an int value . If the argument  is one or smaller, it returns the integer  value  one. Otherwise it returns the product  of all the integers  from one to its argument .

So the value  of fact(4) is 1*2*3*4 and the value  of fact(10) is 1*2*3*4*5*6*7*8*9*10.

Assume  further that the variable   k has been declared  and initialized  to a positive integer .

Assume  further that the variable   x has been declared  as an integer  type .

Write a statement  that assigns  x the value  k*(k-1)*(k-2)*...*3*2*1 by calling the fact function and multiplying its return value  by k.

Note: your solution must include multiplying fact's return value  by k here.

Explanation / Answer

#include<iostream>

using namespace std;

int fact(int k)

{

int ans;

if(k==1)

return 1;

ans = fact(k-1);

return ans*k;

}

int main()

{

int k,x;

cout<<"enter a number : "

cin>>k

x=fact(k);

cout<<x;

}

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