cpp sample code

1#include<iostream>
2using namespace std;
3
4int main()
5{
6cout << " hello world <<endl;
7  
8  return 0;
9}

1// Your First C++ Program
2
3#include <iostream>
4
5int main() {
6    std::cout << "Hello World!";
7    return 0;
8}
9

1#include<iostream>
2using namespace std;
3
4int main()
5{
6cout << " hello world" <<endl;
7  
8  return 0;
9}