这是一个计算所有月订阅总额的程序。但问题是netflixBill，disneyBill等的值在函数调用时为0，所以总额只是struct元素。我已经尝试了所有我知道的方法，但我不明白为什么它不起作用。enter image description here

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

struct Subscription {
  char name[100];
  float price;
};


int check_login(char *, char *);
void askSubscriptionQuestions(bool *, bool *, bool *, bool *);
struct Subscription ask_subscription();
float total_price(struct Subscription subscriptions[], int num_subscriptions, float netflixBill, float disneyBill, float hboBill, float spotifyBill);

struct Subscription ask_subscription(void) {
  struct Subscription subscription;
  printf("What is the name of the subscription? ");
  scanf("%s", subscription.name);
  printf("How much do you pay every month for it? ");
  scanf("%f", &subscription.price);
  return subscription;
}

int main()
{
  float netflixBill = 0.0f, disneyBill = 0.0f, hboBill = 0.0f, spotifyBill = 0.0f;
  char id[20];
  char password[20];
  bool hasPassed;
  bool hasNetflix;
  bool hasDisneyPlus;
  bool hasHBO;
  bool hasSpotify;
  char response;
  struct Subscription subscriptions[100];
  int num_subscriptions = 0;
  while (1) {
    printf("Enter your ID: ");
    scanf("%s", id);

    printf("Enter your password: ");
    scanf("%s", password);

    if (check_login(id, password)) {
      printf("Access granted.\n");
      hasPassed = true;
      break;
    } else {
      hasPassed = false;
      printf("Access denied.\n");
    }
  }


  printf("Do you have any monthly subscriptions? (y/n) ");
  char c;

  while (c != 'y' && c != 'Y' && c != 'n' && c != 'N') {
    scanf("%s", &c);
    if (c != 'y' && c != 'Y' && c != 'n' && c != 'N'){
      printf("Invalid input. Please enter 'y' or 'n': ");
    }
  }
printf("%f %f %f %f", netflixBill, disneyBill, hboBill, spotifyBill);
  if (c == 'y' || c == 'Y') {
    askSubscriptionQuestions(&hasNetflix, &hasDisneyPlus, &hasHBO, &hasSpotify);
  } else if (c == 'n' || c == 'N') {
    printf("OK, thank you for your answer.\n");
  }printf("%f %f %f %f", netflixBill, disneyBill, hboBill, spotifyBill);

  printf("Do you have any other monthly subscriptions (Y/N)? ex: YT Premium, iCloud, etc.\n");
  scanf("%s", &response);

  while (response == 'Y' || response == 'y') {
    subscriptions[num_subscriptions] = ask_subscription();
    num_subscriptions++;

    printf("Do you have any other monthly subscriptions (Y/N)? ");
    scanf("%s", &response);
  }

  if (num_subscriptions > 0) {
    printf("Your subscriptions are:\n");
    for (int i = 0; i < num_subscriptions; i++) {
      printf("- %s: $%.2f\n", subscriptions[i].name, subscriptions[i].price);
    }
  } else {
    printf("You do not have any other monthly subscriptions.\n");
  }

  float total = total_price(subscriptions, num_subscriptions, netflixBill, disneyBill, hboBill, spotifyBill);
    printf("The total cost of all your subscriptions is $%.2f\n", total);
  return 0;
}

int check_login(char *id, char *password) {
  if (strcmp(id, "admin") == 0 && strcmp(password, "pass123") == 0) {
    return 1;
  } else {
    return 0;
  }
}

void askSubscriptionQuestions(bool *hasNetflix, bool *hasDisneyPlus, bool *hasHBO, bool *hasSpotify) {
  char c;
  int netflixPlan, spotifyPlan;
  float netflixBill = 0.0f, disneyBill = 0.0f, hboBill = 0.0f, spotifyBill = 0.0f;
  printf("Do you have a subscription to Netflix? (y/n) ");
  scanf("%s", &c);
  if (c == 'y' || c == 'Y') {
    *hasNetflix = true;
    printf("Which monthly plan do you have? Here is a list: \n");
    printf("\t 1 for Minimum = 7.99$/month\n");
    printf("\t 2 for Standard = 9.99$/month\n");
    printf("\t 3 for Premium = 11.99/month\n");
    scanf("%d", &netflixPlan);
    if(netflixPlan == 1){
        netflixBill = 7.99;
    }
        else if(netflixPlan == 2){
            netflixBill = 9.99;
        }
            else
                netflixBill = 11.99;
        } else {
    *hasNetflix = false;
    printf("You don't have a Netflix subscription. \n");
  }

  printf("Do you have a subscription to Disney+? (y/n)\n ");
  scanf("%s", &c);
  if (c == 'y' || c == 'Y') {
    *hasDisneyPlus = true;
    disneyBill = 5.99;
    printf("The subscription for Disney+ is 5.99$/month.\n");
  } else {
    *hasDisneyPlus = false;
    printf("You don't have a Disney+ subscription. \n");
  }

  printf("Do you have a subscription to HBO? (y/n)\n ");
  scanf("%s", &c);
  if (c == 'y' || c == 'Y') {
    *hasHBO = true;
    hboBill = 4.99;
    printf("The subscription for HBO is 4.99$/month.\n");
  } else {
    *hasHBO = false;
    *hasHBO = false;
    printf("You don't have a HBO subscription. \n");
  }

  printf("Do you have a subscription to Spotify? (y/n) ");
  scanf("%s", &c);
  if (c == 'y' || c == 'Y') {
    *hasSpotify = true;
    printf("Which monthly plan do you have? Here is a list: \n");
    printf("\t 1 for Premium = 4.99$/month\n");
    printf("\t 2 for Premium for students = 2.49$/month\n");
    scanf("%d", &spotifyPlan);
    if(spotifyPlan == 1)
        spotifyBill = 4.99;
        else
            spotifyBill = 2.49;
  } else {
     printf("You don't have a Spotify subscription. \n");
    *hasSpotify = false;
  }
}

float total_price(struct Subscription subscriptions[], int num_subscriptions, float netflixBill, float disneyBill, float hboBill, float spotifyBill) {
  float total = netflixBill + disneyBill + hboBill + spotifyBill;
  for (int i = 0; i < num_subscriptions; i++) {
    total += subscriptions[i].price;
  }
  return total;
}

我试过使用指针（idk如果我做得对的话）.试过使用chatgpt但是它也不知道问题是什么.