c++ - which way is better when using getline? -

when reading file, have 2 ways

way 1:

ifstream fin("data.txt");  const int line_length = 100;  char str[line_length];   while( fin.getline(str,line_length) ) {         cout << "read file: " << str << endl; } 

way 2:

ifstream fin("data.txt");   string s;   while( getline(fin,s) ) {         cout << "read file: " << s << endl;  } 

which better? personlly, prefer way2 since don't need specify max length, what's comments?

way 2 better (more idiomatic, avoids hard-coded lengths break parsing). i'd write differently:

for(string s; getline(fin,s); ) {         cout << "read file: " << s << endl;  }