Use C ++ command-line arguments

Use basic form of the command-line arguments

• argc: Is the number of parameters 初始值为1.
  argv[]: The deposit is the first address of a command line parameter, the initial value from the 1start.

  as follows:

  The position of program execution	argv[0]
  NULL	argv[1]

• Code

  #include <bits/stdc++.h>
  using namespace std;
  int main(int argc, char *argv[])
  {
  	//程序执行部分
  	return 0;
  }
  

Examples

• Use cmdthe calling program, given the parameters, execute the program.
  cmd 可执行程序路径 参数1 参数2

• Characters read out, and output.

• 读取文件And 输出到文件when used ‘<', and ‘>’(note, not have the main function argvand argcinput parameters)

• Code:

  #include <bits/stdc++.h>
  using namespace std;
  int main(int argc, char *argv[])
  {
  	for (int i = 1; i <= argc; i++)
  	{
  		cout << argv[i] << endl;
  	}
  	return 0;
  }
  
  

• test: