Code - Player Scores demo

// A Score Tracker for players in a game
// Also a demo of arrays and functions

// Marc Chee (cs1511@cse.unsw.edu.au) June 2020

#include <stdio.h>

#define NUM_PLAYERS 4

void print_scores(int score_array[], int length);
int winning_player(int score_array[], int length);

int main(void) {
    int scores[NUM_PLAYERS] = {0};
    
    // directly assign scores to players
    scores[0] = 12;
    scores[1] = 76;
    scores[2] = 34;
    scores[3] = 56;
    
    print_scores(scores, NUM_PLAYERS);
    
    int winner_index = winning_player(scores, NUM_PLAYERS);    
    printf("Player %d is currently winning the game.\n", winner_index + 1);    
}

// Prints out the players and their scores, one per line
void print_scores(int score_array[], int length) {
    int i = 0;
    while (i < length) { // have visited i elements
        printf("Player %d's score is %d.\n", i + 1, score_array[i]);
        i++;
    } // i == length
}

// Returns the index of the player with the highest score
// Assumes scores are positive
int winning_player(int score_array[], int length) {
    // set the highest to a very low number
    int highest = -1;
    // set the highest index to an index that's not in the array
    int highest_index = -1;
    
    // loop through the scores array
    int i = 0;
    while (i < length) {
        // for each element, check if it's higher than the highest (we've seen so far)
        if (score_array[i] > highest) {
            // if it's higher, replace the highest
            // keep track of the index of the highest score        
            highest = score_array[i];
            highest_index = i;
        }
        
        i++;
    } // i == length
    return highest_index;
}