Simple C++ input from file…how to?

Question

I have a file:

P 0.5 0.6 0.3
30 300
80 150
160 400
200 150
250 300
T
r  45 0 0
s 0.5 1.5 0 0
t 200 –150
.
.
.

When I read in \'P\' I know that

Answer 1

user to read text file line by line and then run string word;

ifstream fin(your file)
while(! fin.eof())
{
    string line = fin.getline();
    istringstream iss(line, istringstream::in);
    string token;
    while( iss >> token)     
    {
      if (token.compare("T")) {
        ...
      } else {
        float f = atof(token.c_str());
     }
    }
}