c - 'list' 未声明(在此函数中首次使用)

Question

我有以下代码。 'list' undeclared (first use in this function) 时出现错误。 请帮助我

#include <stdio.h>
#include <stdlib.h>
struct list{
int data;
struct list *next;
};
typedef struct list *head;

int main()
{
    struct list *start;
    int i;

    start = (list *) malloc(sizeof(struct list));
    printf("\nEnter the data : \n");
    scanf("%d", &i);
    start->data = i;
    start->next = NULL;
    while(list->next != NULL)
    {
        printf("%d ", list->data);
        list = list->next;
    }

    return 0;
}

Answer 1

您正在使用类型 list 而不是变量名 start。正确的代码:

while (start->next != NULL)
{
    start = start->next;
    // etc.
}