How to understand int Main (int Argc, const char ** argv)

tags: c++

How to understand`int main(int argc, const char** argv)`

Write a simple print program to see

#include <iostream>
using namespace std;

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

Compile in the command line, see the result

C:\Users\Desktop>g++ 716.cpp

C:\Users\Desktop>a.exe 778 666 999
a.exe
778
666
999

So you can seeargc Is the number of parameters input after you execute the file + 1
+1 is becauseThe default first parameter is the name of the file
argv Is it a chasettion of a char *, where the plot points to the pointer to the parameter variable

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