read in txt file in C++

Question

I have a .txt parameter file like this:

#Stage
filename = "a.txt";
...

#Stage
filename = "b.txt";
...

Basically I want to read one stage each time I access the parameter file. I planed to use getline in C++ with delimiter "#Stage" to do this. Or there is a better way to solve this? Any sample codes will be helpful.

Answer 1

Maybe I should express more clear. Anyway, I manage like this:

ifstream file1;
file1.open(parfile, ios::binary);
if (!file1) {
    cout<<"Error opening file"<<parfile<<"for read"<<endl;
    exit(1);
}

std::istreambuf_iterator<char> eos;
std::string s(std::istreambuf_iterator<char>(file1), eos);

unsigned int block_begin = 0;
unsigned int block_end = string::npos;

for (unsigned int i=0; i<stage; i++) {

    if(s.find("#STAGE", block_begin)!=string::npos) {
    block_begin = s.find("#STAGE", block_begin);
    }
}

if(s.find("#STAGE", block_begin)!=string::npos) {
block_end = s.find("#STAGE", block_begin);
}


string block = s.substr(block_begin, block_end);

stringstream ss(block);
....