C++ application using library says no members detected - c++

Question

So, I have an application that uses a bunch of math formulas in a DOS choose a number style. So I made a static library and I currently have them linked but when I try using a function it will say no members detected. Here's my code (the important parts):
// The library header file:
namespace Library_ {
static float min, max, n, rem, i, r, l, w, m, v, k, r1, r2, r3, r4, h, b,
b1, b2, s, value, count = 0; static float f = 1;
static class Main
{
public:
class Geometry_2Dimensional
{
static void rectangle();
static void circle();
static void ETGRadius();
static void ETGSide();
};
class Geometry_3Dimensional
{
static void prismRectangle();
static void prismTriangle();
static void cylinder();
static void sphere();
};
class Computing
{
static void rng();
static void binary(int num);
};
class Number_Theory
{
static void average();
static void primeCheck();
static void primeFactors();
static void factorial();
};
static void Error();
};
}
// The Library source file:
include "CalculatorLib.h"
include <stdexcept>
include <iostream>
include <time.h>
include <math.h>
include <cstdlib>
include <conio.h>
using namespace std;
namespace Library_
{
void Main::Error()
{
cout << "Not a valid option." << endl;
system("PAUSE");
}
void Main::Geometry_2Dimensional::rectangle()
{
cout << "Length: "; cin >> l;
cout << "Width: "; cin >> w;
cout << "Area: " << l * w << "\nPerimeter: " << (2 * l) + (2 * w) <<
endl;
system("PAUSE");
}
void Main::Geometry_2Dimensional::circle()
{
cout << "Radius: "; cin >> r;
cout << "Area: " << r * 3.14 * r << "\nCircumference: " << r * 6.28 <<
endl;
system("PAUSE");
}
void Main::Geometry_2Dimensional::ETGRadius()
{
cout << "Integer part: "; cin >> r1;
cout << "Radicant: "; cin >> r2;
r3 = sqrt(r2);
m = (sqrt(3) / 3);
if (r2 == 3)
{
n = r1 * 3;
cout << "The side length of the triangle is: " << n << endl;
v = n / 2;
k = sqrt((n * n) - (v * v));
cout << "The area of the triangle is: " << (k * n) / 2 << endl;
system("PAUSE");
}
else
{
r4 = r3 * r1;
n = r4 / m;
cout << "The side length of the triangle is: " << n << endl;
v = n / 2;
k = sqrt((n*n) - (v*v));
cout << "The area of the triangle is: " << (k * n) / 2 << endl;
system("PAUSE");
}
}
void Main::Geometry_2Dimensional::ETGSide()
{
cout << "Enter the side length: "; cin >> s;
r = (s / 3) * sqrt(3);
cout << "The radius of the inner circle is: " << r << endl;
v = s / 2;
k = sqrt((s*s) - (v*v));
n = k * s;
cout << "The area of the triangle is: " << n / 2 << endl;
system("PAUSE");
}
void Main::Geometry_3Dimensional::prismRectangle()
{
cout << "Length: "; cin >> l;
cout << "Width: "; cin >> w;
cout << "Height: "; cin >> h;
cout << "Area: " << l*w*h << "\nSurface Area: " << (2 * (l*w)) + (2 *
(l*h)) + (2 * (h*w)) << endl;
system("PAUSE");
}
void Main::Geometry_3Dimensional::sphere()
{
cout << "Radius: "; cin >> r;
cout << "Volume: " << 3.14 * (4 / 3) * r * r * r << "\nSurface Area: "
<< 12.56 * r * r << endl;
system("PAUSE");
}
void Main::Geometry_3Dimensional::cylinder()
{
cout << "Radius: "; cin >> r;
cout << "Height: "; cin >> h;
cout << "Volume: " << 3.14 * r * r * h << "\nSurface Area: " << 6.28 * r
* h * (r + h) << endl;
system("PAUSE");
}
void Main::Geometry_3Dimensional::prismTriangle()
{
cout << "Base of the base: "; cin >> b;
cout << "Height: "; cin >> h;
cout << "Length: "; cin >> l;
cout << "Other sides of base: " << "\nFirst other side: "; cin >> b1;
cout << "Second other side: "; cin >> b2;
cout << "Volume: " << h * b * l << "\nSurface Area: " << (2 * b * h) +
((b + b1 + b2) * l) << endl;
system("PAUSE");
}
void Main::Computing::rng()
{
cout << "Enter the minimum: "; cin >> min;
cout << "Enter the maximumL "; cin >> max;
cout << "Enter the number of generations: "; cin >> n;
int range = max - min + 1;
unsigned first = time(NULL);
srand(first);
for (i = 0; i < n; i++)
{
r = rand() / 100 % range + min;
cout << r << " ";
}
cout << endl;
system("PAUSE");
}
void Main::Computing::binary(int num)
{
if (num <= 1)
{
cout << num;
return;
}
rem = num % 2;
binary(num / 2);
cout << rem;
}
void Main::Number_Theory::average()
{
cout << "Enter the number of values: "; cin >> n;
float average(0);
for (int i = 0; i < n; ++i)
{
cin >> value;
average += value;
}
average /= n;
cout << "Average is " << average << endl;
system("PAUSE");
}
void Main::Number_Theory::factorial()
{
cout << "Enter the number: "; cin >> n;
for (int a = 1; a <= n; a++)
{
f *= a;
}
cout << "The factorial is: " << f << endl;
system("PAUSE");
}
void Main::Number_Theory::primeCheck()
{
cout << "Enter the number: "; cin >> n;
int count = 0;
for (int a = 1; a <= n; a++)
{
if (fmod(n, a) == 0)
{
count++;
}
}
if (count == 2)
{
cout << "The number " << n << " is prime!" << endl;
system("PAUSE");
}
else
{
cout << "The number " << n << " is not prime." << endl;
system("PAUSE");
}
}
void Main::Number_Theory::primeFactors()
{
cout << "Enter the number: "; cin >> n;
while (fmod(n, 2) == 0)
{
cout << "2, ";
n /= 2;
}
for (int i = 3; i <= sqrt(n); i += 2)
{
while (fmod(n, 1) == 0)
{
cout << i << ", ";
n /= i;
}
}
if (n > 2)
{
cout << n << ", ";
}
}
}
And then the main source file, that can't use any of the functions because intellisense says no members included.
Side note: I am including both the header file and using the namespace Library_.
If this seems rushed, it is because I have to get off. And also, in addition to solving this problem, can someone tell me when and when not to use static?
Thanks!

Answer 1

You are making so many mistakes here it is hard to know where to begin, using classes as if they were namespaces, using global variables, doing input and output in library code, not using function parameters and function returns, using static inappropriately, etc. etc. Also it is impossible to answer your question because you don't show how you are trying to call your functions.
I can answer one question which is 'when to use static'. At your level of experience the answer is never use static. You've got to learn the basics first.
Forget classes. forget namespaces, forget global variables, first learn how to how to write functions, how to use local variables, how to pass values to and return values from functions.
For example the following is perfectly acceptable beginner code
void Geometry_2Dimensional_ETGRadius(float r1, float r2, float& n, float& k)
{
float r3 = sqrt(r2);
float m = (sqrt(3) / 3);
if (r2 == 3)
{
n = r1 * 3;
float v = n / 2;
k = sqrt((n * n) - (v * v));
}
else
{
float r4 = r3 * r1;
n = r4 / m;
float v = n / 2;
k = sqrt((n*n) - (v*v));
}
}
int main()
{
float r1, r2, n, k;
cout << "Integer part: "; cin >> r1;
cout << "Radicant: "; cin >> r2;
Geometry_2Dimensional_ETGRadius(r1, r2, n, k);
cout << "The side length of the triangle is: " << n << endl;
cout << "The area of the triangle is: " << (k * n) / 2 << endl;
system("PAUSE");
}
See how the variables only used inside the function (r3, m etc) are declared inside the function. The values needed by the function are declared as parameters of the function (r1, r2) and the values returned by the function are declared as reference parameters (n and k). This is basic stuff and it is what you should get familiar with before you try anything more advanced.