main argv argc c++ code example

Example 1: c++ argv

// command line arguments in c++ are stored in an array of c-strings
// # of arguments: argc
// actual arguments: argv

#include <iostream>
using namespace std;

int main(int argc, char** argv){
  for(int i = 0; i < argc; i++){
    cout << "argv" << i << ": " << argv[i] << endl;
  }
  return 0;
}

/*

./main.exe hello world

argv0: main.exe
argv1: hello
argv2: world

*/

Example 2: argument to number C++

// C++ Code
int x = atoi(argv[1]);