Code - Tourist demo at the end of the Lecture

// A heavily modified version of paint.c for Assignment 1

// This is starter code for the Tourist Program

// This program was written by Marc Chee (marc.chee@unsw.edu.au)
// in June 2019
//

#include <stdio.h>

// The dimensions of the map
#define N_ROWS 10
#define N_COLS 10

#define EXPLORED 1
#define UNEXPLORED 0

// Helper Function: Print out the map as a 2D grid
void printMap(int map[N_ROWS][N_COLS], int posR, int posC);
int countScore(int map[N_ROWS][N_COLS]);

int main(void) {
    int map[N_ROWS][N_COLS] = {UNEXPLORED};
    int touristR = N_ROWS/2;
    int touristC = N_COLS/2;

    printMap(map, touristR, touristC);


    int keepRunning = 1;
    while (keepRunning) {
        // mark where we've been already
        map[touristR][touristC] = 1;
        
        int input = -1;
        scanf("%d", &input);    
        if (input == 8) {
            // up
            touristR--;
        } else if (input == 2) {
            // down
            touristR++;
        } else if (input == 4) {
            // left
            touristC--;
        } else if (input == 6) {
            // right
            touristC++;
        } else if (input == 0) {
            keepRunning = 0;
        }
        
        // Stop the tourist from walking off the edge
        if (touristR < 0) {
            // off the top
            touristR = 0;
        } else if (touristR >= N_ROWS) {
            // off the bottom
            touristR = N_ROWS - 1;
        } else if (touristC < 0) {
            // off the left
            touristC = 0;
        } else if (touristC >= N_COLS) {
            // off the right
            touristC = N_COLS - 1;
        }
        
        printMap(map, touristR, touristC);
        
        // have I been here before?
        if (map[touristR][touristC] == EXPLORED) {
            printf("I've been here before . . . how boring!\n");
            keepRunning = 0;
        }
    }    
    
    
    return 0;
}


// Prints the map, by printing the integer value stored in
// each element of the 2-dimensional map array.
// Prints a T instead at the position posR, posC
void printMap(int map[N_ROWS][N_COLS], int posR, int posC) {
    int row = 0;
    while (row < N_ROWS) {
        int col = 0;
        while (col < N_COLS) {
            if(posR == row && posC == col) {
                printf("T ");
            } else {
                printf("%d ", map[row][col]);
            }            
            col++;
        }
        row++;
        printf("\n");
    }
}

// Possible Challenge:
// Write a function that gives the tourist a score
// by counting the number of places they visited after
// they stopped travelling

int countScore(int map[N_ROWS][N_COLS]) {
    int score = 0;
    
    // TODO: Calculate the score here
    
    return score;
}