Question

create a program that calculates a factorial of a user defined number. after the first result is displayed, make sure to delete the old number from memory. make sure to display the entire number and to terminate the program if a number less than 1 is entered.

use a linked list implementation and c++ to developed the application.

Answer 1

Solution:

The required function is given below:

code:

void factorial(int number)

{

int result[MAX];

// Initialize resultult

result[0] = 1;

int result_size = 1;

// Apply simple factorial formula n! = 1 * 2 * 3 * 4...*n

for (int x=2; x<=number; x++)

result_size = multiply(x, result, result_size);

cout << "The factorial of the given number is: ";

for (int i=result_size-1; i>=0; i--)

cout << result[i];

}

//The below function is to do the multiplication part

int multiplyTheNumbers(int x, int result[], int result_size)

{

int carryGenerated = 0; // Initialize carryGenerated

//multiplying one by one the individual digits of the array result

for (int i=0; i<result_size; i++)

{

int product = result[i] * x + carryGenerated;

result[i] = product % 10; // storing last digit in the productuct

carryGenerated = product/10;   

}

//storing the carery part in the result

while (carryGenerated)

{

result[result_size] = carryGenerated%10;

carryGenerated = carryGenerated/10;

result_size++;

}

return result_size;

}

I hope this helps if you find any problem. Please comment below. Don't forget to give a thumbs up if you liked it. :)