#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <SFML/Window.hpp>
#include <SFML/System.hpp>
#include <iostream>

const int SCREEN_WIDTH = 800;
const int SCREEN_HEIGHT = 600;
const float GRAVITY = 0.5f;
const float FLAP_STRENGTH = 10.0f;

int main() {
    sf::RenderWindow window(sf::VideoMode(SCREEN_WIDTH, SCREEN_HEIGHT), "Flappy Bird");

    sf::RectangleShape bird(sf::Vector2f(50, 50));
    bird.setFillColor(sf::Color::Red);
    bird.setPosition(SCREEN_WIDTH / 4, SCREEN_HEIGHT / 2);

    sf::RectangleShape pipe(sf::Vector2f(100, SCREEN_HEIGHT));
    pipe.setFillColor(sf::Color::Green);
    pipe.setPosition(SCREEN_WIDTH, 0);

    sf::Font font;
    if (!font.loadFromFile("arial.ttf")) {
        std::cerr << "Font file not found." << std::endl;
        return -1;
    }

    sf::Text gameOverText("Game Over!", font, 50);
    gameOverText.setFillColor(sf::Color::Red);
    gameOverText.setPosition(SCREEN_WIDTH / 2 - 150, SCREEN_HEIGHT / 2 - 25);

    sf::SoundBuffer buffer;
    if (!buffer.loadFromFile("flap.wav")) {
        std::cerr << "Sound file not found." << std::endl;
        return -1;
    }

    sf::Sound flapSound;
    flapSound.setBuffer(buffer);

    float birdYVelocity = 0;
    bool gameover = false;

    while (window.isOpen()) {
        sf::Event event;
        while (window.pollEvent(event)) {
            if (event.type == sf::Event::Closed) {
                window.close();
            }
            if (event.type == sf::Event::KeyPressed && !gameover) {
                if (event.key.code == sf::Keyboard::Space) {
                    birdYVelocity = -FLAP_STRENGTH;
                    flapSound.play();
                }
            }
        }

        if (!gameover) {
            birdYVelocity += GRAVITY;
            bird.move(0, birdYVelocity);

            pipe.move(-1, 0);
            if (pipe.getPosition().x < -pipe.getSize().x) {
                pipe.setPosition(SCREEN_WIDTH, 0);
            }

            if (bird.getPosition().y > SCREEN_HEIGHT || bird.getPosition().y < 0) {
                gameover = true;
            }

            if (bird.getGlobalBounds().intersects(pipe.getGlobalBounds())) {
                gameover = true;
            }
        }

        window.clear();
        window.draw(pipe);
        window.draw(bird);
        if (gameover) {
            window.draw(gameOverText);
        }
        window.display();
    }

    return 0;
}

C Language online compiler

Write, Run & Share C Language code online using OneCompiler's C online compiler for free. It's one of the robust, feature-rich online compilers for C language, running the latest C version which is C18. Getting started with the OneCompiler's C editor is really 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 editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample C program which takes name as input and print your name with hello.

#include <stdio.h>
int main()
{
    char name[50];
    printf("Enter name:");
    scanf("%s", name);
    printf("Hello %s \n" , name );
    return 0;
    
}

About C

C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.

Key features:

  • Structured Programming
  • Popular system programming language
  • UNIX, MySQL and Oracle are completely written in C.
  • Supports variety of platforms
  • Efficient and also handle low-level activities.
  • As fast as assembly language and hence used as system development language.

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);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

One dimentional Array:

data-type array-name[size];

Two dimensional array:

data-type array-name[size][size];

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.

Two types of functions are present in C

  1. Library Functions:

Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,

  1. User defined functions:

User defined functions are the ones which are written by the programmer based on the requirement.

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
}