CODEWITHSUNDEEP
c++
Rodekki
Rodekki

Reputation: 25

No operator matching those operands

I'm also receiving the 'no operator "<<" matches these operands" error while trying to display the information.

    cout << (<- error with these) PrintHex(ASphere.CalcCircumference()) << endl;

I looked around and most people state that it's because of a missing #include. However I think I have everything I need to include. (it also doesn't become a problem until I try to display the info from the functions.)

#include <iostream>
#include <iomanip>
#include <string>

My function looks like this.

void PrintHex(int InNum)
{
cout << hex << setiosflags (ios_base::showbase) << InNum;
};

Upvotes: 0

Views: 210

Answers (3)

Kerrek SB
Kerrek SB

Reputation: 477000

Just say:

PrintHex(ASphere.CalcCircumference());

Your function is not suitable to be used with <<, since it doesn't return anything.

Upvotes: 2

alestanis
alestanis

Reputation: 21863

You are trying to print the output of a function that returns a void, which means nothing.

Return something from your function if you want to print anything.

You can either:

  • Just call PrintHex(ASphere.CalcCircumference()); and print from inside it (what you already do)
  • Return a stringstream or a string from your function and later print it with a cout call

Upvotes: 2

David G
David G

Reputation: 96810

PrintHex already invokes std::cout internally, so there's no reason to put it inside another std::cout call.

PrintHex(ASphere.CalcCircumference());

That's all you need to do for it to print.

Upvotes: 3

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