#include <GL/glut.h>
#include <stdlib.h>
#include <math.h>

// Define the kid's parameters
const float HEAD_RADIUS = 0.5f; // The radius of the kid's head
const float BODY_RADIUS = 0.3f; // The radius of the kid's body
const float ARM_LENGTH = 0.2f; // The length of the kid's arms
const float LEG_LENGTH = 0.3f; // The length of the kid's legs

// Draw the kid's head
void drawHead() {
  // Draw the head as a sphere
  glPushMatrix();
  glTranslatef(0.0f, 0.0f, 0.0f);
  glutSolidSphere(HEAD_RADIUS, 10, 10);
  glPopMatrix();

  // Draw the eyes
  glPushMatrix();
  glTranslatef(0.1f, 0.1f, 0.0f);
  glColor3f(0.0f, 0.0f, 0.0f);
  glutSolidSphere(0.01f, 5, 5);
  glPopMatrix();

  glPushMatrix();
  glTranslatef(-0.1f, 0.1f, 0.0f);
  glColor3f(0.0f, 0.0f, 0.0f);
  glutSolidSphere(0.01f, 5, 5);
  glPopMatrix();

  // Draw the mouth
  glPushMatrix();
  glTranslatef(0.0f, -0.1f, 0.0f);
  glLineWidth(2.0f);
  glBegin(GL_LINES);
  glVertex3f(-0.05f, 0.0f, 0.0f);
  glVertex3f(0.05f, 0.0f, 0.0f);
  glEnd();
  glPopMatrix();
}

// Draw the kid's body
void drawBody() {
  // Draw the body as a cylinder
  glPushMatrix();
  glTranslatef(0.0f, -0.5f, 0.0f);
  glutSolidCylinder(BODY_RADIUS, 0.5f, 10, 10);
  glPopMatrix();
}

// Draw the kid's arms
void drawArms() {
  // Draw the left arm
  glPushMatrix();
  glTranslatef(-0.2f, -0.25f, 0.0f);
  glRotatef(90.0f, 0.0f, 0.0f, 1.0f);
  glutSolidCylinder(0.05f, ARM_LENGTH, 10, 10);
  glPopMatrix();

  // Draw the right arm
  glPushMatrix();
  glTranslatef(0.2f, -0.25f, 0.0f);
  glRotatef(-90.0f, 0.0f, 0.0f, 1.0f);
  glutSolidCylinder(0.05f, ARM_LENGTH, 10, 10);
  glPopMatrix();
}

// Draw the kid's legs
void drawLegs() {
  // Draw the left leg
  glPushMatrix();
  glTranslatef(-0.1f, -0.75f, 0.0f);
  glRotatef(90.0f, 1.0f, 0.0f, 0.0f);
  glutSolidCylinder(0.05f, LEG_LENGTH, 10, 10);
  glPopMatrix();

  // Draw the right leg
  glPushMatrix();
  glTranslatef(0.1f, -0.75f, 0.0f);
  glRotatef(-90.0f, 1.0f, 0.0f, 0.0f);
  glutSolidCylinder(0.05f, LEG_LENGTH, 10, 10);
  glPopMatrix();
}

// Display function
void display() {
  // Clear the screen
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  // Draw the kid

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
}