MathUtility DLL

A small math utility DLL (Dynamic-Link Library) that provides basic arithmetic operations. Demonstrates both static and dynamic linking in C++.

Features

Function	Description
add	Adds two numbers
sub	Subtracts the second number from the first
mul	Multiplies two numbers
divide	Divides the first number by the second number
mod	Returns the remainder of integer division

Dynamic-linking example

#include <iostream>
#include <Windows.h>

typedef double(*mUtil_d)(double, double);
typedef int(*mUtil_i)(int, int);

int main() {
    HMODULE hmod = LoadLibrary(L"MathUtility.dll");
    if (!hmod) {
        std::cout << "Failed to load DLL" << std::endl;
        return 1;
    }

    mUtil_d add = (mUtil_d)GetProcAddress(hmod, "add");
    mUtil_d sub = (mUtil_d)GetProcAddress(hmod, "sub");
    mUtil_d mul = (mUtil_d)GetProcAddress(hmod, "mul");
    mUtil_d div = (mUtil_d)GetProcAddress(hmod, "divide");
    mUtil_i mod = (mUtil_i)GetProcAddress(hmod, "mod");

    std::cout << "2 + 5 = " << add(2, 5) << std::endl; // 7
    std::cout << "3 - 5 = " << sub(3, 5) << std::endl; // -2
    std::cout << "10 * 10 = " << mul(10, 10) << std::endl; // 100
    std::cout << "100 / 4 = " << div(100, 4) << std::endl; // 25
    std::cout << "10 mod 5 = " << mod(10, 5) << std::endl; // 0
    std::cout << "15 / 0 = " << div(15, 0) << std::endl; // nan

    FreeLibrary(hmod);
    return 0;
}

Caution

Make sure you validate each pointer before usage!

//Example 1
if(add) //validated (can use function)
{
   // do stuff with it here.
}

//Example 2
if(!add) //check if failed
{
   std::cout << "Failed to load the add function." << std::endl;
   FreeLibrary(hmod);
   return 1;
}

Static-linking example

#include <iostream>
#include "MathUtility.h"

#pragma comment(lib, "MathUtility.lib")

int main() {
    std::cout << "4 + 5 = " << add(4, 5) << std::endl; // 9
    std::cout << "5 - 5 = " << sub(5, 5) << std::endl; // 0
    std::cout << "2 * 2 = " << mul(2, 2) << std::endl; // 4
    std::cout << "10 / 2 = " << divide(10, 2) << std::endl; // 5
    std::cout << "10 mod 5 = " << mod(10, 5) << std::endl; // 0
    return 0;
}

Installation

Clone the repository:

git clone https://github.com/jmckinney7/MathUtility.git

License

This project is licensed under the MIT License.
See the LICENSE file for details.