I am facing a problem please help me !

[sujan.dasmahapatra]

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!!!

[caduel]

not quite Qt related, right...?

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

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

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

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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.

[buf1024]

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

[Raccoon29]

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