C++爱好者 - 网友留言

#include
#include
#include

#include "grid.h"

using namespace std;

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

  if (argc != 4)
  {
    cerr << "Usage: " << argv[0] << " grid_file col_no row_no" << endl << endl;
    return EXIT_FAILURE;
  }

  grid *g;

  g = new grid (argv[1]);

  int row = atoi (argv[2]);
  int col = atoi (argv[3]);

  cout << "The colony including the cell at "
       << "(" << row << "," << col << ")"
       << " has an area of " << g->count (row,col) << " units." << endl;

  cout << *g << endl;

  delete g;
 
  return EXIT_SUCCESS;

}

这是题目给的main函数，给了grid.h和grid.cpp，还有一个数据文件是sample.grid，我把这个文件放在源文件目录下了，可是看不懂main函数怎么读取这个文件的，而且运行的结果总是在if (argc != 4)就跳出了，输出的是 usage: G:\文档\Visual Studio 2005\Projects\Assessing Infection\debug\assessing infection.exe grid_file col_no row_no

这个问题困扰很久了，希望高手能赐教，感激不尽～～

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