I am facing a problem please help me !

Dear Friends

I am reading an int and a double from file.
How can I check whetheer the value read is an int or double.


int intval;
double doubleval;
ifstream infile("Data.dat")
infile >> intval >> doubleval;

// how can I check whether intval has got an integer and doubleval has got a double value.
//infile.dat has
2 23.323

what happens if infile.dat has data like this

# &&*********

//so it'll read junk values so how could I check the variables.??

Please help me to overcome this problem!!!

not quite Qt related, right...?

anyway, you should be able to use the fail() function on the stream.

Code:

---

int anInt; 
astream >> anInt;
if (astream.fail()) cerr << "not an int"

---

of course you have to take care that a float will usually also be accepted as an int, so if you tolerate either, try the float first.

Anyway, if the file is designed yourself or your team, you should know the format of the file.

If the file is made by you, you could constraint data in binary records to retrieve as structs.