Draw an ellipse divided by straight line into two colored part in C++ Graphics

Prerequisite: How to include graphics.h?, graphics.h
The task is to draw an ellipse that is intersected by a straight line passing through the center of the ellipse diagonally. And then color both segments with different colors.

Approach: To run the program we need to include the following header file:  

#include <graphic.h>

We will create the desired ellipse with the help of the following functions: 

• void ellipse(int x, int y, int from_angle, int to_angle, int x_rad, int y_rad): A function from graphics.h header file is responsible for creating ellipse on the screen.
• void line(int x1, int y1, int x2, int y2): A function from graphics.h header file which draw a line. 
  
• void floodfill(int x, int y, int border_color): A function from graphics.h header file is responsible function is used to fill an enclosed area. Current fill pattern and fill color is used to fill the area.

Below is the implementation of the above approach: 

C++

// C++ program for the above approach
#include <graphics.h>

// Function to set the pattern and
// color to be filled in the given
// segment
void fill(int x, int y,
          int color, int boundary)
{
    //It will sets the current fill
    //pattern and fill color

    setfillstyle(SOLID_FILL,color);

    // fill the color in segment
    // having point (x, y) and
    // border color = boundary
    floodfill(x, y, boundary);
}

// Function to create the ellipse
// using graphic library
void drawEllipse()
{
    // gm is Graphics mode which is a
    // computer display mode that
    // generates image using pixels

    // DETECT is a macro defined in
    // "graphics.h" header file
    int gd = DETECT, gm, error;

    // initgraph initializes the
    // graphics system
    initgraph(&gd, &gm, "");

    // set the color used for drawing
    setcolor(YELLOW);

    // Center of ellipse
    int x = 150, y = 150;

    // Draw complete ellipse angle will
    // be from 0 to 360
    int from_angle = 0, to_angle = 360;

    // Radius of ellipse
    int x_rad = 130, y_rad = 80;

    // Ellipse function
    ellipse(x, y, from_angle,
            to_angle, x_rad, y_rad);

    // End points of a line passing
    // through center of above ellipse
    int x1 = 80, y1 = 80, x2 = 220, y2 = 220;

    // Line for above end points
    line(x1, y1, x2, y2);

    // Fill different color in two
    // parts of ellipse, choose point
    // (x-1, y) and (x+1, y)
    // because line is passing diagonally
    fill(x - 1, y, RED, YELLOW);
    fill(x + 1, y, GREEN, YELLOW);

    getch();

    // closegraph function closes
    // graphics mode and deallocates
    // all memory allocated by graphics
    closegraph();
}

// Driver Code
int main()
{
    // Function call
    drawEllipse();
    return 0;
}

Output: