C - 无限循环

Question

此代码中的 for 循环永远不会结束并陷入无限循环，但我不明白为什么。在 for 循环中进行赋值时，我曾尝试使用临时变量代替 i，但这也不起作用。

指针指向大小为 10 的数组，其余代码在没有 for 循环的情况下运行良好。此外，计算机只会猜测 0。我猜这只是我的一个愚蠢错误，但我想不通。

编辑:只需将所有代码拉到帖子中

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

void setBoard(int *board);
void setComputerBoard(int *board);
int playGame(int *human, int *computer);

int main() {
    srand(time(NULL));

    int humanBoard[10];
    int *human = humanBoard;

    int computerBoard[10];
    int *computer = computerBoard;

    setBoard(human);
    setComputerBoard(computer);

    int winner = playGame(human, computer);

    if (winner == 0)
        printf("Computer Wins!\n");
    else
        printf("Human Wins!\n");

    return 0;
}

void setBoard(int *board) {
    int pos1, pos2, i;
    printf("Enter 1st position: ");
    scanf("%d", &pos1);

    while (pos1 > 9 || pos1 < 0) {
        printf("Enter 1st position: ");
        scanf("%d", &pos1);
    }

    printf("Enter 2nd position: ");
    scanf("%d", &pos2);

    while ((pos2 > 9) || (pos2 < 0) || (abs(pos2 - pos1) != 1)) {
        printf("Enter 2nd position: ");
        scanf("%d", &pos2);
    }

    for (i = 0; i < 10; i++) {
        printf("%d", i);
        *(board + i) = 0;
    }

    *(board + pos1) = 2;
    *(board + pos2) = 2;
}

void setComputerBoard(int *board) {
    int pos1 = rand() % 10, pos2;
    if (pos1 == 9)
        pos2 = pos1 - 1;
    else
        pos2 = pos1 + 1;

    int i;
    for (i = 0; i < 10; i++) {
        if (i != pos1 && i != pos2)
            *(board + i) = 0;
        else
            *(board + i) = 2;;
    }
}

int playGame(int *human, int *computer) {
    int winner = -1;
    int computerShot, humanShot;
    int computerHit = 0, humanHit = 0;
    int i;

    while (winner == -1) {
        computerShot = humanShot = -1;

        printf("Computer guesses ");
        do {
            computerShot = rand() % 10;
        } while ((*(human + computerShot) != 1) && (*(human + computerShot) != 3));

        printf("%d\n", computerShot);
        if (*(human + computerShot) == 2) {
            printf("HIT!\n");
            *(human + computerShot) = 3;
            computerHit++;
        } else {
            printf("MISS!\n");
            *(human + computerShot) = 1;
        }
        printf("Human Board: \n");
        printf("0 1 2 3 4 5 6 7 8 9\n");
        for (i = 0; i < 10; i++) {
            if (*(human + i) == 0)
                printf("* ");
            else
            if (*(human + i) == 1)
                printf("M ");
            else
            if (*(human + i) == 2)
                printf("S ");
            else
                printf("H ");
        }

        printf("\nComputer Board: \n");
        printf("0 1 2 3 4 5 6 7 8 9\n");
        for (i = 0; i < 10; i++) {
            if (*(computer + i) == 0)
                printf("* ");
            else
            if (*(computer + i) == 1)
                printf("M ");
            else
            if (*(computer + i) == 2)
                printf("S ");
            else
                printf("H ");
        }

        printf("\nEnter guess: ");
        scanf("%d", &humanShot);
        printf("You guessed %d\n", humanShot);
        if (*(computer + humanShot) == 2) {
            printf("HIT!\n");
            *(computer + humanShot) == 3;
            humanHit++;
        } else {
            printf("MISS!\n");
            *(computer + humanShot) == 1;
        }

        printf("Human Board: \n");
        printf("0 1 2 3 4 5 6 7 8 9\n");
        for (i = 0; i < 10; i++) {
            if (*(human + i) == 0)
                printf("* ");
            else
            if (*(human + i) == 1)
                printf("M ");
            else
            if (*(human + i) == 2)
                printf("S ");
            else
                printf("H ");
        }
        printf("\n");

        printf("Computer Board: \n");
        printf("0 1 2 3 4 5 6 7 8 9\n");
        for (i = 0; i < 10; i++) {
            if (*(computer + i) == 0)
                printf("* ");
            else
            if (*(computer + i) == 1)
                printf("M ");
            else
            if (*(computer + i) == 2)
                printf("S ");
            else
                printf("H ");
        }
        printf("\n");
        if (computerHit == 2)
            winner = 0;
        else
        if (humanHit == 2)
            winner = 1;
    }
}

Answer 1

您的问题不是 for 循环，而是 playGame 函数中的 do-while 循环。 while条件需要改成

while ((*(human+computerShot == 1) || (*(human+computerShot) == 3));

因为当它等于 1 或 3(已经分别命中或未命中)时您想重​​做击球