How can you print a variable before you add a value to it?

Question

This is the code that works

#include <iostream>
using namespace std;

void printSomething(int x) {
cout << x;
}

int main() {
printSomething(42);
}

But shouldn't the code be

#include <iostream>
using namespace std;

void printSomething(int x) {
}

int main() {
printSomething(42);
cout << x;
}

Answer 1

in the second code printSomthing(int x){ } does litterally nothing .. it has no implementation so it does nothing ..
you may try this code
#include <iostream>
using namespace std;
void PrintSomething(int newvalue, int &x)
{
x = newvalue;
}
void main()
{
int x;
PrintSomething(42,x);
cout << x;
}

Answer 2

in this case I recommend the function call should be ChangeValue instead of PrintSomething .. unless you stick with your first code such that PrintSomething actually does cout something. I hope that helped.