I have a simple problem, I am unable to view the results from a struct statement that I defined in a header file. If I leave out the usual cout << statement the program compiles correctly but as soon as I include the cout << statement the compile generates errors. I have the proper #include statements and the using namespace std statement. Can someone shed some light on this problem?

Thanks
Matt

... shed some light ...
Could we see your code? (Don't just tell us; show us.)

Regards,

Dave

Thanks for the quick response.

I moved all of the code to the .cpp file. This is the example given in chapter 1 of NR3.

... example given in chapter 1 of NR3.

Well, in order to print the value that the functor gives, you have to use it as a function

#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

//
// A struct with a functor
// The functor calculates c*pow(x, p), where
// c and p are parameters fixed by the constructor
// and x is an input parameter for the evaluation.
//
struct Contimespow {

/// the struct definition goes here, including the functor implementation

};

int main()
{
//
// Create an object with c = 4.0 and p = 0.5
//
Contimespow h(4.0, 0.5);


//
// Here's a loop that uses the overloaded () operator
//
double x;

cout << "Enter a value for x: ";
cout << scientific;
while (cin >> x) {
cout << "h(" << x << ") = " << h(x) << endl << endl;
cout << "Enter another value for x: ";
}
cout << "Goodbye for now." << endl;

return 0;
}


Output from a typical run:


Enter a value for x: 1
h(1.000000e+00) = 4.000000e+00

Enter another value for x: 2
h(2.000000e+00) = 5.656854e+00

Enter another value for x: 3
h(3.000000e+00) = 6.928203e+00

Enter another value for x: 4
h(4.000000e+00) = 8.000000e+00

Enter another value for x: 5
h(5.000000e+00) = 8.944272e+00

Enter another value for x: 6
h(6.000000e+00) = 9.797959e+00

Enter another value for x: 7
h(7.000000e+00) = 1.058301e+01

Enter another value for x: 3.1415926535897932384626433832795029
h(3.141593e+00) = 7.089815e+00

Enter another value for x: Tttthat's all, Folks!
Goodbye for now.


Regards,

Dave

Dave,

Thank you very much. My code works just as it should and the struct statement makes perfect sense to me now.

Matt