How to read a file line by line to a string type variable?
I'm trying to read a file line by line to a string type variable using the following code:
#include <iostream>
#include <fstream>
ifstream file(file_name);
if (!file) {
cout << "unable to open file";
exit(1);
}
string line;
while (!file.eof()) {
file.getline(line,256);
cout<<line;
}
file.close();
it won't compile when I try to use String class, only when I use char file[256]
instead.
how can I g开发者_StackOverflow社区et line by line into a string class?
Use std::getline
:
std::string s;
while (std::getline(file, s))
{
// ...
}
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