#include <iostream>

#include <typeinfo>

#include <string>

#include <cmath>

#define print(x) std::cout << x << std::endl

// for a static variable or function, the name can only be used in the file

static int private_var = 5;

enum Example

{

A = -10, B, C

};

namespace space1

{

enum Animal: char

{

// the value in "enum" must be an integer

SHEEP,

COW,

DONKEY,

FISH

};

int add(int a, int b)

{

return a + b;

}

}

namespace space2

{

// for a inline function, it means that whatever code defined in the function

// will be copied to the place where the function is executed instead of just

// calling the specific function saved in a memory.

inline int add(int a, int b)

{

return (a + b) * 2;

}

}

int main(int argc, char const *argv[])

{

print(space1::SHEEP);

print(space1::Animal::FISH);

print("Example A,B,C val: " << A << " " << B << " " << C);

// new assignment can be made but make sure that the value can only be

// those included in "enum" such as A, B, or C.

space1::Animal DOG = space1::FISH;

print(DOG);

Example val = B;

print(val);

// but mind that the new assigned variable does not belong to the space

// or the name of "enum". It only represents itself.

int ans1 = space1::add(1, 2);

int ans2 = space2::add(1, 2);

print(ans1);

print(ans2);

return 0;

}