Talk:cpp/io/basic ifstream/close
From cppreference.com
example for open, is_open and close
#include <fstream>
#include <iostream>
using namespace std;
int main (int argc, char *argv[])
{
// could start with index is always prog name
cout<<"usage: "<< argv[0] <<" <filename>\n";
if(argc > 1) {
char *pFilename = argv[1];
cout<<"usage: "<< pFilename <<" <filename>\n";
// We assume argv[1] is a filename to open
ifstream the_file(pFilename);
// Always check to see if file opening succeeded
if(!the_file.is_open()) {
cout<<"Could not open file\n";
}
else {
char x;
// the_file.get ( x ) returns false if the end of the file
// is reached or an error occurs
while (the_file.get(x)) {
cout<< x;
}
}
the_file.close();
}
return 0;
}
