利用整数列表存放整数 输入非整数结束存放 最终返回输入的整数

/*建立一个整数链表*/
#include <stdio.h>
#include <stdlib.h> 
struct chain
{
    int value;
    struct chain *next;
};
struct chain *create()
{
    struct chain *head, *tail, *p;
    int x;
    head = tail = NULL;
    printf("Input data.
");
    while (scanf("%d", &x) == 1)    /*如果输入的是一个整型的数据，那么向下执行*/
    {
        p = (struct chain *)malloc(sizeof (struct chain));
        /*首先为要新创建的表元p开辟一个内存空间*/
        p->value = x;
        p->next = NULL;
        if (head == NULL)
            head = tail = p;
        else
            /*tail为倒数第二个表元指针，tail->始终指向最后一个表元*/
            tail = tail->next;
        tail->next = p;
    }
    return head;
}

int main(){
    struct chain *p, *q;
    q = create();
    while (q) {
        printf("%d
", q->value);
        p = q->next;
        free(q);
        q = p;
    }
    getchar();
    return 0;
}