reading data character by character from text file

[tspga]

doubles values are stored in text file. 23.5 36.8 34.2 my teacher has advised me to read them character by character and then make words, like i have to read "2" "3" "." "5" and now have to make it or treat it as word and then using atoi() i have to convert it into double. but i dont know how to do this could anyone plz explain with some code relevant to my example. im new to filing so pardon me for basic questioning

[treuss]

Can be done, but why?

Why not just read the floating values:

   std::ifstream input("test.txt");
   double d;
   while (input >> d) {
      std::cout << "Read " << d << "\n";
   }

[tspga]

following errors incured
error C2065: 'input' : undeclared identifier
E:\MyProjects\practice\practice.cpp(54) : error C2296: '>>' : illegal, left operand has type 'double'
E:\MyProjects\practice\practice.cpp(54) : error C2297: '>>' : illegal, right operand has type 'double'

[laserlight]

It would help if you showed us the code too.

[tspga]

double d;
//char ch;

ifstream file("E:\\abc.txt");
if(!file)
{
cout<<"error";
exit(1);
}

while(input>>d)
{

std::cout<<d;
}
file.close();
getch();

[laserlight]

You declared your ifstream to be named file, then you used the name input. You should be consistent.