如何使用指针在C中填写结构数组？

如何解决如何使用指针在C中填写结构数组？

我试图打印出用户为餐厅评论输入的详细信息，我希望它打印出多个的详细信息，但我的代码只打印最后一个条目。

以下是输入示例：

Enter Number of reviews: 2  
Enter Your Name: Bob  
Enter Name of restaurant: Ramon Ramen Shoo  
Enter address of restaurant: #15 Orange Gold Street  
Enter phone number: 19178089323  
Enter score: 70  

Enter Your Name: Bill  
Enter Name of restaurant: McDonalds  
Enter address of restaurant: #7 Goldy Street  
Enter phone number: 19132089323  
Enter score: 4   

我希望它打印出两个评论的详细信息，但只重复打印最后一个条目，而不是打印条目 1 和条目 2 的详细信息。

这是我的代码：

#include <stdio.h>
#include <string.h>
#define MAX_REVIEWS 1000000
#define MAX_SIZE 1024
typedef struct Review{
    char reviewer_name[MAX_SIZE];
    char restaurant_name[MAX_SIZE];
    char restaurant_address[MAX_SIZE];
    char phone[10];
    int score;
}review;
void fill_out_review(review *rp){
    printf("Enter your name: ");
    fgets(rp -> reviewer_name,1024,stdin);

    printf("Enter name of restaurant: ");
    fgets(rp -> restaurant_name,stdin);

    printf("Enter address of restaurant: ");
    fgets(rp -> restaurant_address,stdin);

    printf("Enter Phone Number: ");
    fgets(rp -> phone,11,stdin);

    printf("Enter score: ");
    scanf("%d",&rp -> score);
    getchar();

    rp++;
}

void print_details(review *rp){
    printf("\n\nName of reviewer: %s\n",rp -> reviewer_name);
    printf("Name of restaurant: %s\n",rp -> restaurant_name);
    printf("Address of restaurant: %s\n",rp -> restaurant_address);
    printf("Phone Number: %s\n",rp -> phone);
    if(rp -> score > 100 || rp -> score < 0 ){
        printf("Error: INVALID score!");
    }
    else{
        printf("score: %d\n",rp -> score);
    }
    rp++;

}
int main(){
    //review rev1[MAX_REVIEWS] = {{{0},{0},0}};
    review rev1;
    review *ptr = NULL;
    ptr = &rev1;
    int num_reviews;

    printf("Enter Number of reviews: ");
    scanf("%d",&num_reviews);
    getchar();

    for(int i = 0; i < num_reviews; i++){
        fill_out_review(ptr);

        //ptr++;
    }
    ptr = &rev1;

    for(int i = 0; i < num_reviews; i++){
        printf("\n\nDetails of review %d:",(i+1));
        print_details(ptr);

        //ptr++;
    }





}

解决方法

您正在使用指针进行覆盖，您只需定义一个指针数组即可完成此操作。

int num_reviews;
printf("Enter Number of reviews: ");
scanf("%d",&num_reviews);

review *ptr=malloc(sizeof(review)*num_reviews);//dynamically pointer array.
review *first=ptr;//take the beginning address.
getchar();

for(int i = 0; i < num_reviews; i++){
    fill_out_review(ptr);
    ptr++;
}
   
ptr=first; //to print all elements,back to the first element.
for(int i = 0; i < num_reviews; i++){
    printf("\n\nDetails of review %d:",(i+1));
    print_details(ptr);
    ptr++;
}