CPP

C (gcc 8.3) sample

#include <stdio.h>
 
int main(void) { 
	int x;
	for(; scanf("%d",&x) > 0 && x != 42; printf("%d
", x));
	return 0;
}

C++ (gcc 8.3) sample

#include <iostream>
using namespace std; // consider removing this line in serious projects
 
int main() {
	int intNum = 0;
 
	cin >> intNum;
	while (intNum != 42) {
		cout << intNum << "
";
		cin >> intNum;
	}
 
	return 0;
}

C++14 (gcc 8.3) sample

#include <iostream>
using namespace std; // consider removing this line in serious projects
 
int main() {
	auto func = [] () {
		int intNum = 0;
		cin >> intNum;
		while (intNum != 42) {
			cout << intNum << "
";
			cin >> intNum;
		}
	};
	func();
 
	return 0;
}