Complete the implementation of the draw_lines function. This function displays s

Question

Complete the implementation of the draw_lines function. This function displays several lines on the screen.

This exercise will to give you a chance to practice with two functions from the ZDK.

draw_line( x1, y1, x2, y2, c ) displays a line constructed from character c between two end points, (x1, y1) and (x2, y2).

show_screen() makes the latest changes to the screen visible.

Notes:

Your task is to draw a connected poly-line (using the '~' symbol) between the following locations on the screen: (19, 14), (66, 13), (67, 18), (10, 18). A final stroke should connect the last point back to the first.

The program should produce a display that resembles the image below. Your results will not be exactly the same as this view, because each user gets a unique set of parameters. However, it should give you an idea what to aim for.

Avoid direct use of ncurses, or standard I/O functions such as printf(). The AMS is looking for a ZDK screen.

Use this test driver to implement and test your function prior to submission.

#include "cab202_graphics.h"

void draw_lines(void){
   // (a) Draw a line from (19,14) to (66,13).

   // (b) Draw a line from (66,13) to (67,18).

   // (c) Draw a line from (67,18) to (10,18).

   // (d) Draw a line from (10,18) to (19,14).

   // Leave the following instruction unchanged.
   show_screen();
}

int main( void ) {
   setup_screen( );

   draw_lines();

   draw_string( 0, screen_height( ) - 1, "Press any key to finish..." );
   wait_char( );
   cleanup_screen( );
   return 0;
}

Explanation / Answer

//main.c

#include "cab202_graphics.h"

void draw_lines(void){

// (a) Draw a line from (19,14) to (66,13).

draw_line( 19, 14, 66,13, '~' );

// (b) Draw a line from (66,13) to (67,18).

draw_line ( 66,13,67,18 , '~' );

// (c) Draw a line from (67,18) to (10,18).

draw_line(67,18, 10,18, '~' );

// (d) Draw a line from (10,18) to (19,14).

draw_line(10,18,19,14, '~' );

// Leave the following instruction unchanged.

show_screen();

}

int main( void ) {

setup_screen( );

draw_lines();

draw_string( 0, screen_height( ) - 1, "Press any key to finish..." );

wait_char( );

cleanup_screen( );

return 0;

}

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