c 2b 2b input from terminal when program is called

1  int i;
2  cout << "Please enter an integer value: ";
3  cin >> i;

1#include <iostream>
2
3int main(){
4  std::cout << "Hello World!" << std::endl; // prints "Hello World"
5}

1#include <iostream>
2#include <string>
3
4int main( int argc, char* argv[] )
5{
6    std::string my_arg;
7
8    // First argument is always the name of your program
9    std::cout << argv[0] << std::endl;
10
11    if( argc == 2 )
12    {
13        // Something has been passed in
14        my_arg = argv[1];
15        std::cout << "Argument passed in is " << my_arg << std::endl;
16    }
17
18    return 0;
19}