c语言数据结构航班信息的录入

Question

//main.c
#include "fligh.h"

int main()
{
    while(1)
    {
        Welcome();
        char ch = getch();// 读取字符

        switch(ch)
        {
            case '1':// 录入
                Import_fligh();
                break;
            case '2':// 显示
                break;
            case '3':// 按要求查找
                break;
            case '4':// 信息排序
                break;
            case '0':// 退出
                break;
        }
    }

    return 0;
}




```c

```c
//fligh.c
#include "fligh.h"

// 欢迎
void Welcome()
{
    printf("\tWelcome to Flight System\t\n");
    printf("==========================================\n");
    printf("[1]Import [2]Print [3]Find [4]Sort [0]Quit\n");
    printf("==========================================\n");
}

// 录入航班信息
void Import_fligh()
{
    // 创建一个新的节点
    fligh_node *head = malloc(sizeof(fligh_node));
    fligh *pnew = malloc(sizeof(fligh));
    head->next = NULL;

    // 头插法
    if(head == NULL)
    {
        head = pnew;
    }
    else
    {
        head = head->next;
    }
    
    printf("输入航班号：\n");
    scanf("%s",head->data.number);
    printf("输入起点站：\n");
    scanf("%s",head->data.staddress);
    printf("输入终点站：\n");
    scanf("%s",head->data.arraddress);
    printf("输入班期：\n");
    scanf("%s",head->data.date);
    printf("输入机型：\n");
    scanf("%s",head->data.type);
    printf("输入起飞时间：\n");
    scanf("%s",head->data.stime);
    printf("输入到达时间：\n");
    scanf("%s",head->data.atime);
    printf("输入航票价：\n");
    scanf("%s",head->data.price);

    printf("信息录入成功\n");
    system("pause");// 暂停
    system("cls");// 清屏
}

```c
fligh.h
#ifndef __FLIGHT_H
#define __FLIGHT_H
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>

typedef struct fligh
{
    char number[10];// 航班号
    char staddress[10];// 起点站
    char arraddress[10];// 终点站
    char date[10];// 班期
    char type;// 机型
    int stime;// 起飞时间
    int atime;// 到达时间
    float price;// 票价
}fligh;

typedef struct fligh_node
{
    fligh data;
    struct fligh_node *next;
}fligh_node;

//欢迎
void Welcome();
// 录入航班信息
void Import_fligh();

#endif

求大佬解答，应该是创建节点有问题，但是本人找不出来

```

Answer 1

整体修改完善如下，改动处见注释，供参考：

//fligh.h
#ifndef __FLIGHT_H
#define __FLIGHT_H
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>

typedef struct fligh
{
    char number[10];// 航班号
    char staddress[10];// 起点站
    char arraddress[10];// 终点站
    char date[10];// 班期
    char type[16];// 机型         char type; 修改
    char stime[10];// 起飞时间    int  stime;修改
    char atime[10];// 到达时间    int  atime;修改
    float price;// 票价
}fligh;

typedef struct fligh_node
{
    fligh  *data;           // 修改     
    struct fligh_node* next;
}fligh_node;

fligh_node* Head = NULL;    // 修改

//欢迎
void Welcome();
// 录入航班信息
void Import_fligh();
//显示航班信息
void print();              // 修改

#endif

//---------------------------------------------


//main.c
#include "fligh.h"

int main()
{
    while (1)
    {
        Welcome();
        char ch = getch();// 读取字符

        switch (ch)
        {
        case '1':// 录入
            Import_fligh();
            break;
        case '2':// 显示
            print();
            break;
        case '3':// 按要求查找
            break;
        case '4':// 信息排序
            break;
        case '0':// 退出
            break;
        }
    }

    return 0;
}


//----------------------------------------------


//fligh.c
#include "fligh.h"

// 欢迎
void Welcome()
{
    printf("\tWelcome to Flight System\t\n");
    printf("==========================================\n");
    printf("[1]Import [2]Print [3]Find [4]Sort [0]Quit\n");
    printf("==========================================\n");
}

// 录入航班信息
void Import_fligh()
{
    // 创建一个新的节点
    if (!Head) {                                       // 修改
        Head = (fligh_node*)malloc(sizeof(fligh_node));// 修改
        Head->data = NULL;                             // 修改
        Head->next = NULL;
    }
    
    fligh_node* pnew = (fligh_node*)malloc(sizeof(fligh_node));// 修改
    pnew->data = (fligh*)malloc(sizeof(fligh));                // 修改   
    pnew->next = NULL;

    // 头插法
    pnew->next = Head->next;   // 修改
    Head->next = pnew;         // 修改

    printf("输入航班号：\n");
    scanf("%s", pnew->data->number);
    printf("输入起点站：\n");
    scanf("%s", pnew->data->staddress);
    printf("输入终点站：\n");
    scanf("%s", pnew->data->arraddress);
    printf("输入班期：\n");
    scanf("%s", pnew->data->date);
    printf("输入机型：\n");
    scanf("%s", pnew->data->type);
    printf("输入起飞时间：\n");
    scanf("%s", pnew->data->stime);
    printf("输入到达时间：\n");
    scanf("%s", pnew->data->atime);
    printf("输入航票价：\n");
    scanf("%f", &pnew->data->price);  //scanf("%s", pnew->data->price); 修改

    printf("信息录入成功\n");
    system("pause");// 暂停
    system("cls");// 清屏
}

void print()                          // 修改
{
    fligh_node* pt = NULL;
    if (!Head || !Head->next)
        printf("NULL\n");
    else {
        pt = Head->next;
        printf("%-10s %-10s %-10s %-10s %-16s %-10s %-10s %-10s\n",
            "航班号", "起点站", "终点站", "班期", "机型", "起飞时间", "到达时间", "票价");
        while (pt) {
            printf("%-10s %-10s %-10s %-10s %-16s %-10s %-10s %-10.2f\n", 
                pt->data->number,pt->data->staddress, pt->data->arraddress, pt->data->date, 
                pt->data->type,  pt->data->stime, pt->data->atime, pt->data->price);
            pt = pt->next;
        }
    }
}