source code of /small-scripts/stackexchange/dice.c

Last modified	2016-10-11
Lines	66

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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#define N_DICE 3
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/* Conveniently return the sum. */
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int roll_dice(int *dice)
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{
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    int i, sum;
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    for (i = sum = 0; i < N_DICE; i++)
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    {
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        dice[i] = rand()%6 + 1;
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        sum += dice[i];
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    }
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    return sum;
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}
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void print_dice(int *dice, int sum)
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{
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    int i;
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    printf("\n\n");
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    for (i = 0; i < N_DICE; i++)
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        printf("Die %d: %d\n", i + 1, dice[i]);

    printf("-------------------\nTotal: %d\n\n", sum);

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}
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int main()
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{
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    int runs, dice[N_DICE], sum, old_sum, correct, correct_guesses;

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    char guess;
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    srand(time(NULL));
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    correct_guesses = 0;
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    sum = roll_dice(dice);
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    printf("How many times do you want to play? ");

    for (scanf("%d", &runs); runs; runs--)

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    {
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        print_dice(dice, sum);
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        old_sum = sum;
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        sum = roll_dice(dice);
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        printf(
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            "Do you think the next total will be higher, "

            "the same, or lower than the previous total? "

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            "(h, s, l)\n"
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        );
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        scanf(" %c", &guess);
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        switch (guess)
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        {
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            case 'h': correct = sum > old_sum; break;

            case 's': correct = sum == old_sum; break;

            case 'l': correct = sum < old_sum; break;

            default: correct = 0; printf("Not h, s or l.\n");

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        }
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        if (correct)
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        {
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            printf("You guessed correctly!\n");

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            correct_guesses++;
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        }
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        else
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            printf("You guessed incorrectly!\n");

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    }
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    printf("You got a total of %d guesses correct!\n", correct_guesses);

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}
```