Question

Write a c program that generates the numerical lottery.You have to define an array of 500x6. Here are 6 blocks. There are numbers between 1-49 in each block. (1 and 49 included.) The ball is drawn from each block. (1 ball selection from each block) you get everyone's guess.This array table is estimated by 500 people(everyone pulls 6 balls).Then you fill this array with the random function. Then you define an array of 1x6. (This is the numbers of the balls at the end of the draw.) You have to fill this with the rand function.You fill out with the predictions, then you write a function that compares the result.Like how many people know 1 ball, how many people know two balls ….. Then you file them.

Answer 1

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

// helper method to check if a num exist in array 
// of size, so that we don't put duplicate balls
int indexOf(int arr[], int num, int size) {
    int i=0;
    for(i=0; i<size; i++) {
        if(arr[i] == num) {
            return i;
        }
    }
    return -1;
}

void fillGuesses(int guessLine[], int size) {
    int i=0;

    while(i != size) {
        // fill at i th position
        int guess = rand() % 49 + 1;
        while(indexOf(guessLine, guess, i) != -1) {
            guess = rand() % 49 + 1;
        }
        guessLine[i++] = guess;
    }
}

// Helper function to print guesses if required
void printArr(int arr[], int size) {
    int i;
    for(i=0; i<size; i++) {
        printf("%d ", arr[i]);
    }
    printf("
");
}

int main(void) {
    int i;

    // 500 people make guesses with 6 balls
    int guesses[500][6];
    int draw[6];

    // fill guesses with rand function
    for(i=0; i<500; i++) {
        fillGuesses(guesses[i], 6);
        //printArr(guesses[i], 6);
    }

    // fill the final draw of balls
    fillGuesses(draw, 6);

    // Array to hold how many people guess balls correctly
    // count[i] tells number of people who guess i balls 
    // correctly out of 6 balls.
    int counts[7] = {0};

    for(i=0; i<500; i++) {
        int correct = 0;
        int j;

        for(j=0; j<6; j++) {
            if(indexOf(draw, guesses[i][j], 6) != -1) {
                correct++;
            }
        }

        counts[correct] += 1;
    }

    for(i=1; i<=6; i++) {
        printf("Number of people guessing %d balls correctly: %d
", i, counts[i]);
    }


    printf("
");
    return 0;
}

Please upvote, as i have given the exact answer as asked in question. Still in case of any concerns in code, let me know in comments. Thanks!