#include <iostream>
#include <vector>

class FamilyNode {
public:
    std::string name;
    std::vector<FamilyNode*> children;

    FamilyNode(std::string name) : name(name) {}

    void addChild(FamilyNode* child) {
        children.push_back(child);
    }
};

class FamilyTree {
private:
    FamilyNode* root;

public:
    FamilyTree(std::string name) {
        root = new FamilyNode(name);
    }

    FamilyNode* getRoot() {
        return root;
    }

    void printTree(FamilyNode* node, int level = 0) {
        if (node == nullptr) return;

        for (int i = 0; i < level; i++) {
            std::cout << "  ";
        }
        std::cout << "- " << node->name << std::endl;

        for (auto child : node->children) {
            printTree(child, level + 1);
        }
    }
};

int main() {
    FamilyTree tree("Grandparent");

    FamilyNode* parent1 = new FamilyNode("Parent1");
    FamilyNode* parent2 = new FamilyNode("Parent2");

    tree.getRoot()->addChild(parent1);
    tree.getRoot()->addChild(parent2);

    parent1->addChild(new FamilyNode("Child1"));
    parent1->addChild(new FamilyNode("Child2"));

    parent2->addChild(new FamilyNode("Child3"));
    parent2->addChild(new FamilyNode("Child4"));

    std::cout << "Family Tree:" << std::endl;
    tree.printTree(tree.getRoot());

    return 0;
}

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
}