#include <iostream>

class Slot {

  public:
  
  int GetMinWidth() const { return min_width_; };
  int GetMaxWidth() const { return max_width_; };
  
  // Builder class
  class SlotBuilder {
    public:
    
     SlotBuilder& SetMinWidth(int min_width) {
       min_width_ = min_width;
       return *this;
     }
     
     SlotBuilder& SetMaxWidth(int max_width) {
       max_width_ = max_width;
       return *this;
     }
     
     Slot Build() {
       return Slot(min_width_, max_width_);
     }
    
    private:
    int min_width_{/* you can add default value here*/};
    int max_width_{/* you can add default value here*/};
  };
  
  
  // This is optional, but creates a neat interface
  static SlotBuilder Create() {
    static SlotBuilder slot_builder;
    return slot_builder;
  }
  
  private:
  // Make constructor private to restrict access and force the use of the builder
  Slot(int min_width, int max_width) : min_width_(min_width), max_width_(max_width) {}

  const int min_width_;
  const int max_width_;
  // .
  // .
  // Continue with your const attributes
};

int main() {
    // Create the slot with the builder
    Slot slot = Slot::Create()
                .SetMinWidth(10)
                .SetMaxWidth(20)
                .Build();
    std::cout << slot.GetMinWidth() << ", " << slot.GetMaxWidth();
    return 0;
}
by

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}