核心转储？

Question

#include <stdio.h>
#include <cs50.h>
#include <stdbool.h>


typedef struct shop {

         string custName;

         string custAdd;

         string custNum;

         string custClothPrice;



struct shop* next;

}

shop;



int main (void)



{
struct shop* head; 



   head = NULL;

struct shop* pointer=NULL; 


printf("**********WELCOME TO AZIZIYAH CREATIONS**********\n\n"); 

char cont = 'y';


printf("Please enter customer details\n");

printf("Please Enter NAME   : ");



  head->custName = GetString();

printf("Please Enter Address: ");

  head->custAdd = GetString();

printf("Please Enter Cell No: ");

  head->custNum = GetString();
printf("Please Enter Price  : ");

  head->custClothPrice = GetString();

return 0;

printf("Would you liked to add more customer(s)?: Y/N:");


  cont = GetChar();

  head->next = pointer;

if (cont == 'Y' || cont == 'y')



 {

    pointer = malloc(sizeof(shop));

    pointer->next = NULL;

    }
while (cont == 'y' || cont == 'Y' )

{

printf("Please enter customer details\n");

printf("Please Enter NAME   : ");

    pointer->custName = GetString();

printf("Please Enter Address: ");

    pointer->custAdd = GetString();

printf("Please Enter Cell No: ");

    pointer->custNum = GetString();

printf("Please Enter Price  : ");

    pointer->custClothPrice = GetString();

printf("Would you liked to add more customer(s)?: Y/N:");

    cont = GetChar();
if (cont == 'Y' || cont == 'y')

{

    pointer->next = malloc(sizeof(shop));
    pointer = pointer ->next;

        }



    }

printf("\n\nDETAILS OF CUSTOMER ARE AS FOLLOWS:-\n");

struct shop* traverse;

    traverse = head;

    if (traverse->next == NULL)

printf("WAS FOUND NULL\n");



while (traverse->next != NULL)

{

printf("%s\n", traverse->custName);

printf("%s\n", traverse->custAdd);

printf("%s\n", traverse->custNum);

printf("%s\n", traverse->custClothPrice);

   traverse = traverse->next;
    }

    printf("**********THANK YOU FOR VISITING**********\n");   

}

使应用程序在首次输入后产生分段错误（核心转储）错误输出 **********欢迎来到 AZIZIYAH CREATIONS **********

请输入客户详细信息请输入姓名：asd 分段错误（核心已转储）

请帮忙

Answer 1

分配给 head->custName 会导致崩溃：您需要为 head 分配内存，然后才能将内容写入它指向的位置。如果你不这样做，你的程序就会崩溃。您可以像这样使用 malloc() 为 head 分配内存：

head = malloc(sizeof *head);
if (head == NULL) {
    /* error handling code here */
}

记得插入适当的错误处理代码。

核心转储？

Getting core dumped?

c

cs50