Something

#include <iostream>using namespace std;int getX();void logicBlock(int x);void manipulateX(int* x);int main(int argc, char **argv){	int x = getX();	logicBlock(x);	// or: x = manipulateX(x);	manipulateX(&x);	logicBlock(x);}int getX(){	int x;	cout << "Enter value: ";	cin >> x;	// did x really get read?	return x;}void logicBlock(int x){	switch(x) {		case 4:			cout << "It's 4" << endl;						break;		case 5:			cout << "It's 5" << endl;		break;		default:			cout << "I don't know" << endl;	}}void manipulateX(int* x){	*x *= 2;}int manipulateX(int x){	// or just: return x * 2;	x *= 2;	return x;}