A little calculator

#include <cstdio>
#include <iostream>
#include <cmath>


// A Calculator made in C++

void Addition() {
int xx;
int yy;
std::cin >> (xx);
std::cin >> (yy);
std::cout << (xx + yy) << std::endl;
}

void Substraction(){
int xx;
int yy;
std::cin >> (xx);
std::cin >> (yy);
std::cout << (xx - yy) << std::endl;
}

void Division(){
int xx;
int yy;
std::cin >> (xx);
std::cin >> (yy);
std::cout << (xx / yy) << std::endl;
}

void Multiplication(){
int xx;
int yy;
std::cin >> (xx);
std::cin >> (yy);
std::cout << (xx * yy) << std::endl;
}


void Power(){
int xx;
int yy;
std::cin >> (xx);
std::cin >> (yy);
std::cout << pow(xx, yy) << std::endl;
}

void Squareroot(){
int xx;
std::cin >> (xx);
std::cout << sqrt(xx) << std::endl;
}

void question(){
int x;
std::cout << ("What do you want to do (0 to quit, 1+, 2-, 3/, 4*, 5^, 6sqrt") << std::endl;
std::cin >> (x);
}

int main() {
[[maybe_unused]] int x;
question();

if ((x = 1)) {
Addition();
question();
}
if ((x = 2)) {
Substraction();
question();
}
if ((x = 3)) {
Division();
question();
}
if ((x = 4)) {
Multiplication();
question();
}
if ((x = 5)) {
Power();
question();
}
if ((x = 6)) {
Squareroot();
question();
}
if ((x = 0)) {
system("PAUSE");
return 0;
exit;
abort;
}
}

https://github.com/terracraft321/Calculator/blob/df1d4610d86fdab134e54aa630aa1c7f1e4d1daa/main.cpp

I study ICT and I am from Finland