C Graphics Program to Draw Turtle on Screen or Command Line

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C Graphics Program to Draw Turtle on Screen or Command Line

C Graphics Program to Draw Turtle on Screen or Command Line

Source Code

#include <stdio.h>
#include <stdlib.h>

#define WIDTH 50
#define HEIGHT 50

enum TILE_TYPES { EMPTY, FILLED, UP, DOWN };

void penUp(int x, int y);
void penDown(int x, int y);
int turnRight(void);
int turnLeft(void);
int draw(void);
void display(void);
int end(void);

int canvas[WIDTH][HEIGHT];

int main(int argc, char** argv) {

    for (int j = 0; j < HEIGHT; j++) {
        for (int i = 0; i < WIDTH; i++) {
            canvas[i][j] = EMPTY;
        }
    }

    int x = 0, y = 0;  // update these as turtle moves
    canvas[x][y] = UP;

    int input = -1;

    printf("Controls:n");
    printf("1 for pen up (capital T means pen is up)n");
    printf("2 for pen down (lowercase t means pen is down)n");
    printf("3 for turn rightn");
    printf("4 for turn leftn");
    printf("5 for drawing, followed by an int value for how many tiles to drawn");
    printf("6 to display drawingn");
    printf("9 to end programn");

    do {
        printf("Enter command: ");
        scanf("%d", &input);

        switch (input) {
            case 1:
                penUp(x, y);
                break;

            case 2:
                penDown(x, y);
                break;

            case 6:
                display();
                break;

            case 9:
                exit(0);
        }

    } while (input != 0);

    return 0;
}

void penDown(int x, int y){
    if (canvas[x][y] == UP) {
        canvas[x][y] = DOWN;
    }
}

void penUp(int x, int y){
    if (canvas[x][y] == DOWN) {
        canvas[x][y] = UP;
    }
}

void display(void) {

    for (int j = 0; j < HEIGHT; j++) {
        for (int i = 0; i < WIDTH; i++) {
            switch (canvas[i][j]) {
                case EMPTY:
                printf("%c", ' ');
                break;

                case FILLED:
                printf("%c", 'X');
                break;

                case UP:
                printf("%c", 'T');
                break;

                case DOWN:
                printf("%c", 't');
                break;
            }
        }

        printf("n");
    }
}

Final Words

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Hi, I'm Ranjith a full-time Blogger, YouTuber, Affiliate Marketer, & founder of Coding Diksha. Here, I post about programming to help developers.

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