/*
 * Unlike Java, main() is not a method.  Therefore, no class declaration.
 *
 * There are only two valid declarations for main:
 *	int main()
 *	int main(int argc, char *argv[])
 *
 * Don’t even ask about void main().  It does not exist. ⚠ ☢ ☣ ☠
 *
 * main returns an int, a success/failure code to the invoker.
 * 0: success, >0: failures of varying sorts
 * Negative values are just weird.  Many environments (e.g., bash) will
 * only use the lower eight bits of the return value.  E.g., -1 ⇒ 255,
 * which will be confused with a signal return value, 128+signum.
 *
 * argc: number of arguments, including the program name as argv[0]
 *       “argc” stands for “argument count”
 * argv: array of C-style strings, corresponding to program arguments
 *       “argv” stands for “argument vector”
 *
 * argc is always ≥ 1, except in strange embedded environments.
 * The type of argv is always an array of C strings, even if you type
 * arguments that look like numbers or something else.
 *
 * Why is argv[] an array of char *?  Surely it should be strings?
 * - C++ strings didn’t exist in C.
 *
 * Why is argv[] an array of char *?  Surely it should be const char *?
 * - C didn’t have const when this was all invented.
 * - It’s your memory, you should be able to change it.
 */

#include <iostream>

using namespace std;

int main(int argc, char *argv[]) {
    // Display all arguments, including program name.
    for (int i=0; i<argc; i++)
	cout << "argv[" << i << "]: \"" << argv[i] << "\"\n";
    return 0;				    // technically optional
}