C++ 之 argc、argv

   The main function can have two parameters, argc and argv. what task is argc and argv carrying out(执行)?

int main(int argc, char** argv) OR int main(int argc, char* argv[])

argc:  refers to the number of arguments passed（指通过的参数数量）

**argv: a pointer array which points to each argument passed to the program（一个指向每个参数传递给程序的指针数组）

*argv[] and **argv are exactly equivalent;

    The following code demonstrates how to use argc and argv：

#include <iostream>
using namespace std;

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

    Running it with 

./Temp Hello yunfung !