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

//Change the value of k according to your need

#include <iostream>

using namespace std;

int fact(int n) { // Function to calculate the factorial of k-1 sent from main()

if(n == 0)

return 1;

if(n == 1)

return(1);

return(n*fact(n-1));

}

int main () {

int k = 10;

int x = k*fact(k-1); //Function calling with k-1 and multiplying the return value by k

return 0;

}

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