Classes

Question

How to call a function from a class in c++

Answer 1

#include <iostream>

class className {
public:
void functionName();
};

void className::functionName() {
std::cout << "Function called!";
}

int main() {
className newName;
newName.functionName();
return 0;
}

As you can see above, we create a class of name <className>.

In className, we set its public access specifier and have it declare one function <functionName> of void return type.

Afterwards, we declare the same function outside of the class, but specify it being of class <className> via className::<function>. We declare its block of code here, being to print "Function called!"

After that, we go into the main function and instantiate an object of class <className> in order to be able to call its members. This instance is called <newName>.

We then call <newName.functionName()> to access the function from <className> and use its block of code.

NOTE: you don't have to always declare the class functions outside of the class itself. That is just something I do.

Answer 2

https://www.sololearn.com/learn/CPlusPlus/1635/
You can do the same inside the class too!