request for member "..." in "..." which is of non-class type "..." [duplicate]
I've been hunting around for hours trying to figure out what I'm doing wrong, and I've gotten rid of most of my problems but when I try to compile my code in main()
it comes up with this same error message:
request for member "..." in "..." which is of non-class type "..."
and it repeats itself for all of the functions I try to call in main()
. What is the problem? I can't figure out where my error is.
I'm using Terminal on a macbook to compile the code.
Here is my main function:
//Program1.cpp
//Program1Math test function
#include "Program1Math.h"
int main()
{
//Create a Program1Math object
Program1Math myProgram1Math();
myProgram1Math.setNumber1();
myProgram1Math.setNumber2();
myProgram1Math.displayMultiple();
myProgram1Math.displaySine1();
myProgram1Math.displayTangent1();
myProgram1Math.displaySine2();
myProgram1Math.displayTangent2();
}
Here are the member-function definitions for the class:
//Program1Math.cpp
//Program1Math member-function definitions.
#include <iostream>
#include <cmath>
#include "Program1Math.h"
using namespace std;
//constructor makes a Program1Math, adds a开发者_开发问答n blank line
Program1Math::Program1Math()
{
cout << "/n";
}
//function to assign the first integer to its appropriate location
void Program1Math::setNumber1()
{
cout << "Please enter the first integer number /n";
int numberSpot;
cin >>numberSpot;
static_cast<double>(numberSpot);
number1 = numberSpot;
}
//function to assign the second integer to its appropriate location
void Program1Math::setNumber2()
{
cout << "Please enter the second integer number /n";
int numberSpot;
cin >>numberSpot;
static_cast<double>(numberSpot);
number2 = numberSpot;
}
//function to find the sine value for a specified number
void Program1Math::calculateSine( double inputNumber )
{
sineValue = sin( inputNumber );
}
//function to find the tangent value for a specified number
void Program1Math::calculateTangent( double inputNumber )
{
tangentValue = tan( inputNumber );
}
//function to determine if the user-inputted numbers are multiples of each other
void Program1Math::calculateModulus()
{
int number1Int = static_cast<int>(number1);
int number2Int = static_cast<int>(number2);
int modulusValue = number1Int % number2Int;
if ( modulusValue == 0 )
multiple = true;
else
multiple = false;
}
//function to display the whether the numbers are multiples or not
void Program1Math::displayMultiple()
{
if( multiple == true )
cout<< number1 << " is a multiple of " << number2 << "!/n";
else
cout<< number1 << "is not a multiple of " << number2 << "./n";
}
//function to display the sine value of the first number
void Program1Math::displaySine1()
{
calculateSine( number1 );
cout << "Sine(" << number1 << ") = " << sineValue << "/n";
}
//function to display the sine value of the second number
void Program1Math::displaySine2()
{
calculateSine( number2 );
cout << "Sine(" << number2 << ") = " << sineValue << "/n";
}
//function to display the tangent value of the first number
void Program1Math::displayTangent1()
{
calculateTangent( number1 );
cout << "Tan(" << number1 << ") = " << tangentValue << "/n";
}
//function to display the tangent value of the second number
void Program1Math::displayTangent2()
{
calculateTangent( number2 );
cout << "Tan(" << number2 << ") = " << tangentValue << "/n";
}
here is the header file:
#include <cmath>
using namespace std;
class Program1Math
{
public:
Program1Math();
void setNumber1();
void setNumber2();
void calculateSine( double );
void calculateTangent( double );
void calculateModulus();
void displayMultiple();
void displaySine1();
void displaySine2();
void displayTangent1();
void displayTangent2();
private:
double number1;
double number2;
double sineValue;
double tangentValue;
bool multiple;
};
the line Program1Math myProgram1Math();
is interpreted as a function declaration myProgram1Math()
returning Program1Math
;
Just use
Program1Math myProgram1Math;
Only use () when a constructor accepts an parameter (without a default argument).
EDIT : you must compile all the source (.cpp) files that comprise your program. That will produce object files of the same name with a different extension (on windows this is .obj ,for you it's .o).
After that all those .o
-files must be linked togetcher with some compiler-provided libraries to make your executable program.
You should create the Program1Math
instance like this:
Program1Math myProgram1Math;
or to allocate the object on the heap, use the new
keyword:
Program1Math *myProgram1Math = new Program1Math();
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