check_factorial.cpp File Reference

A simple program to check if the given number is a factorial of some number or not. More...

#include <cassert>
#include <cstdint>
#include <iostream>

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Namespaces
namespace	math
	for assert

Functions
bool	math::is_factorial (uint64_t n)
	Function to check if the given number is factorial of some number or not.
static void	tests ()
	Self-test implementations.
int	main ()
	Main function.

Detailed Description

A simple program to check if the given number is a factorial of some number or not.

A factorial number is the sum of k! where any value of k is a positive integer. https://www.mathsisfun.com/numbers/factorial.html

Author

Divyajyoti Ukirde

ewd00010

Definition in file check_factorial.cpp.

Function Documentation

main()

int main

(

void

)

Main function.

Returns

0 on exit

Definition at line 71 of file check_factorial.cpp.

           {
    tests();  // run self-test implementations
    return 0;
}

tests()

static void tests ( )

static

Self-test implementations.

Returns

void

Definition at line 56 of file check_factorial.cpp.

                    {
    assert(math::is_factorial(50) == false);
    assert(math::is_factorial(720) == true);
    assert(math::is_factorial(0) == false);
    assert(math::is_factorial(1) == true);
    assert(math::is_factorial(479001600) == true);
    assert(math::is_factorial(-24) == false);
 
    std::cout << "All tests have successfully passed!" << std::endl;
}