C program to display the animated firecrackers with a message using graphics

In this article, we will discuss how to draw the Rocket using Graphics.

Approach:

• In main() function, call the launch() function. The launch() function is a base which will repeatedly call the fire() & mess() functions until given condition is satisfied.
• The mess() function will contain the Birthday Message.
  • To portray the birthday message, use the settextstyle() & outtextxy() functions. These conditions, with input from the user, determine the maximum height the fireworks can reach.
  • Note that any text can be written before the function call.
• The fire() function initially calls the cracker() function.
  • The cracker() function implements the five firecrackers with the aid of triangles using the line() function in graphics.
  • To color setfillstyle() & floodfill() functions are be used.
  • The fire() function will implement multiple lines of the same length using the line() function.
• The header file “time.h” is used for the delay function present in it. The delay function will allow us to add variation to the animation.

Below is the implementation of the above approach:

C

// C program for the above approach

#include <conio.h>
#include <graphics.h>
#include <stdio.h>
#include <time.h>

// Function to display the crackers
void crackers()
{
    // 1st Cracker
    setfillstyle(SOLID_FILL, RED);
    line(80, 680, 130, 680);
    line(80, 680, 105, 630);
    line(105, 630, 130, 680);
    floodfill(105, 650, 15);

    // 2nd Cracker
    setfillstyle(SOLID_FILL, BLUE);
    line(300, 680, 350, 680);
    line(300, 680, 325, 630);
    line(325, 630, 350, 680);
    floodfill(325, 650, 15);

    // 3rd Cracker
    setfillstyle(SOLID_FILL, BROWN);
    line(500, 680, 550, 680);
    line(500, 680, 525, 630);
    line(525, 630, 550, 680);
    floodfill(525, 650, 15);

    // 4th Cracker
    setfillstyle(SOLID_FILL, GREEN);
    line(700, 680, 750, 680);
    line(700, 680, 725, 630);
    line(725, 630, 750, 680);
    floodfill(725, 650, 15);

    // 5th Cracker
    setfillstyle(SOLID_FILL, CYAN);
    line(920, 680, 970, 680);
    line(920, 680, 945, 630);
    line(945, 630, 970, 680);
    floodfill(945, 650, 15);
}

// Function to display the crackers
// using the crackers() function
void fire()
{
    int v = 625, u = 630, g = 630, h = 625,
        a = 325, n = 325, e = 325, x = 320, j = 330;
    int b = 525, m = 525, f = 525, y = 520,
        k = 530, c = 725, i = 725, o = 725,
        z = 720, l = 730;
    int t = 630, s = 625;

    // Call the crackers functions
    crackers();

    // Iterate until h is 435
    while (h != 435) {
        crackers();

        // Crackers function
        // called
        line(n, g, n, h);
        line(m, u, m, v);
        line(o, u, o, v);
        line(a, u, x, v);
        line(b, u, y, v);
        line(c, u, z, v);
        line(e, t, j, s);
        line(f, t, k, s);
        line(i, t, l, s);

        // Update the value of
        // variables
        a = a - 10;
        x = x - 10;
        u = u - 10;
        v = v - 10;
        g = g - 10;
        h = h - 10;
        b = b - 10;
        y = y - 10;
        c = c - 10;
        z = z - 10;
        t = t - 10;
        s = s - 10;
        e = e + 10;
        f = f + 10;
        i = i + 10;
        j = j + 10;
        k = k + 10;
        l = l + 10;

        // Delay of 30 ms
        delay(30);
    }
}

// Function to display the birthday
// message
void mess()
{
    // Set the text color
    settextstyle(8, 0, 5);

    // Print the birthday message
    outtextxy(200, 350, "HAPPY"
                        " BIRTHDAY TO "
                        "ANYONE....");
}

// Function to call the fire and the
// mess function repeatedly to make
// the fire crackers
void launch()
{
    int q1 = 630, q2 = 590;

    // While Q2 is not the same
    // as 330
    while (q2 != 330) {
        // Clear the screen
        cleardevice();

        // Call the fire and mess
        // function
        fire();
        mess();

        // Print the lines
        line(105, q1, 105, q2);
        line(945, q1, 945, q2);

        // Update the value of q1
        // and q2
        q1 = q1 - 20;
        q2 = q2 - 20;

        // Call the fire and mess
        // function again
        fire();
        mess();

        // Delay of 30 ms
        delay(30);
    }
}

// Driver Code
void main()
{
    int gd = DETECT, gm;

    // Initialize of gdriver
    initgraph(&gd, &gm, "C:\\"
                        "turboc3\\bgi");

    // Launch the fire
    launch();

    // Fill the left circles and text
    // to white color
    setfillstyle(SOLID_FILL, WHITE);
    circle(105, 370, 20);
    floodfill(104, 371, 15);
    floodfill(106, 371, 15);

    // Fill the right circles and text
    // to white color
    setfillstyle(SOLID_FILL, WHITE);
    circle(945, 370, 20);
    floodfill(944, 371, 15);
    floodfill(946, 371, 15);

    // Hold the screen for a while
    getch();

    // Close the initialized gdriver
    closegraph();

    return 0;
}

Output: