file reading

[menewbie]

Hello !

i can read the file in C++ but don't know how to read it between two points

to read the whole file

string STRING;
ifstream infile;
infile.open("file");

while(!infile.eof())
{
           getline(infile,STRING);
           cout<<STRING <<endl;
}

what will be logic to stop reading the file when program finds -1 character?
i suppose i need to do like

while(!infile.eof() || STRING !="-1"){
                    getline(infile,STRING);
                    cout<<STRING<<endl;
}

this one works

while(!infile.eof() && STRING.compare("-1")){
                     getline(infile,STRING);
                     cout<<STRING<<endl;
}

but it is not working can anyone fix it?

Thanks in advance.