Answered Essay: The following part of a program computes and returns the product 1 * 2 * 3 * … * N where N is the


The following part of a program computes and returns the product 1 * 2 * 3 * … * N where N is the input parameter. (This value is called N! And is much used in combinatorics.) However, this function can give unexpected answers for some inputs of N! (Hint: for negative values of N). Add exception handling to this function to catch this situation. You should include both catch and try blocks. Your exception can be of any type, preferably std::exception.

int productOfNumbers (int N) {

int p = 1;

while (N != 0) { // count down until zero

p *= N;



return p;


int main() {
int n;
cout << “give number to compute factorial: “;
cin >> n;
cout << “n! = ” << productOfNumbers(n) << endl;
return 0;

Expert Answer



using namespace std;
int main()
int num,p,fact=1;
cout<<“n Enter a number to find it’s factorial: “;
cin>>num; // Here we are taking input from the user


if(num>0) // Here we are checking if entered number is positive or not
fact=fact*p;// Here we are calculating the factorial of given number
cout<<“The factorial of given number is :”<<fact; // Here we are printing the factorial
else if(num<0) // Here we are checking if entered number is Negative
throw num; // Here we are throwing the Exception
} // End of try block

catch(int p)
cout<<“n You are entered Negative number”;

//Here this statement is printed if try block throw the exception
} // End of catch block

} // End of main

Output1 :


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