C语言中如何获取函数内成员的值你知道吗

int get_the_value_by_return(int input)
{
    return ++input;
}
int *get_the_value_by_return2(void)
{
    int *p0 = (int *)malloc(2*sizeof(int));
    printf(" p0 = %p\r\n", p0);
    return p0;
}
void app_main(void)
{
    printf("init done\r\n");
    int i = 1;
    int get_value = get_the_value_by_return(i);
    printf("get_value = %d\r\n", get_value);
    int *ptr0 = get_the_value_by_return2();
    printf("ptr0 = %p\r\n", ptr0);
    free(ptr0);
    ptr0 = NULL;
    while (1) {
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }
}

void get_the_value_by_addr(int input, int *output)
{
    *output = ++input;
}
void get_the_value_by_addr1(int **output)
{
    int *p1 = (int *)malloc(2*sizeof(int));
    printf(" p1 = %p\r\n", p1);
    *output = p1;
}
void get_the_value_by_addr2(void ***output)
{
    int *p2 = (int *)malloc(2*sizeof(int));
    printf(" p2_addr = %p\r\n", &p2);
    *output = &p2;
}
void app_main(void)
{
    printf("init done\r\n");
    int i = 1;
    int get_value = 0；
    get_the_value_by_addr(i, &get_value);
    printf("get_value = %d\r\n", get_value);
    int *ptr1 = NULL;
    get_the_value_by_addr1(&ptr1);
    printf("ptr1 = %p\r\n", ptr1);
    free(ptr1);
    ptr1 = NULL;
    int **ptr2 = NULL;
    get_the_value_by_addr2(&ptr2);
    printf("ptr2 = %p\r\n", ptr2);
    free(*ptr2);
    ptr2 = NULL;
    while (1) {
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }
}