c语言中怎么输出数组

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int i;

    for (i = 0; i < 5; i++) {
        printf("%d ", arr[i]);
    }

    printf("\n");
    return 0;
}

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int *ptr = arr;

    while (*ptr) {
        printf("%d ", *ptr);
        ptr++;
    }

    printf("\n");
    return 0;
}

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int *ptr = arr;

    while (ptr < arr + 5) {
        printf("%d ", *ptr);
        ptr++;
    }

    printf("\n");
    return 0;
}

int main() {
    int arr[] = {1, 2, 3, 4, 5};

    printf("整数数组：");
    for (int i = 0; i < 5; i++) {
        printf("%d ", arr[i]);
    }
    printf("\n");

    float arr_f[] = {1.2, 2.3, 3.4, 4.5, 5.6};

    printf("浮点数数组：");
    for (int i = 0; i < 5; i++) {
        printf("%f ", arr_f[i]);
    }
    printf("\n");

    char arr_s[] = "Hello";

    printf("字符串数组：%s\n", arr_s);

    return 0;
}