汽车数据和文件操作

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <errno.h> 

#include <assert.h>

#define MAX 100

typedef struct Peoinfo

{

char name[20];

char num[20];

int price;

}Peoinfo;

typedef struct Car

{

Peoinfo* date;

int count;

}Car;

void AddContact(Car* pc, int n)

{

assert(pc);

if (pc->count >= n)

{

printf("通讯录已经满了\n");

return;

}

printf("请输入品牌：");

scanf("%s", pc->date[pc->count].name);

printf("请输入型号：");

scanf("%s", &pc->date[pc->count].num);

printf("请输入价格：");

scanf("%d", &pc->date[pc->count].price);

pc->count++;

printf("增加成功\n");

return;

}

void ShowContact(const Car* pc)

{

assert(pc);

if (pc->count == 0)

{

printf("通讯录是空的\n");

return;

}

printf("%10s\t%10s\t%10s\t\n", "品牌", "型号","价格");

for (int i = 0; i < pc->count; i++)

{

printf("%10s\t%10s\t%10d\n",

pc->date[i].name,

pc->date[i].num,

pc->date[i].price);

}

return;

}

int Find(Car* pc, char num[])

{

assert(pc);

for (int i = 0; i < pc->count; i++)

{

if (strcmp(pc->date[i].num, num) == 0)

{

return i;

}

}

return -1;

}

void SearchContact(Car* pc)

{

assert(pc);

char num[20] = { 0 };

printf("请输入要查找的车的型号\n");

scanf("%s", num);

int i = Find(pc, num);

if (i == -1)

{

printf("要查找的车不存在\n");

return;

}

printf("%-10s\t%10s\t%10s\n", "品牌", "型号","价格");

printf("%-10s\t%10s\t%10d\n",

pc->date[i].name,

pc->date[i].num,

pc->date[i].price);

}

// ... (其他代码不变)

void DeleContact(Car* pc)

{

assert(pc);

char num[20] = { 0 };

if (pc->count == 0)

{

printf("名单是空的\n");

return;

}

printf("请输入要删除的车的型号\n");

scanf("%s", num);

int pos = Find(pc, num);

if (pos == -1)

{

printf("要删除的车的数据不存在\n");

return;

}

for (int i = pos; i < pc->count - 1; i++)

{

pc->date[i] = pc->date[i + 1];

}

pc->count--;

printf("删除成功\n");

}

void print(Car* pc,int n)

{

char arr[MAX];

printf("请输入文件的绝对路径\n");

scanf("%255s", arr);

FILE* p1 = fopen(arr, "w");

if (p1 == NULL)

{

perror("error");

return;

}

for (int i = 0; i < pc->count; i++)

{

fprintf(p1,"%10s\t%10s\t%10d\n",

pc->date[i].name,

pc->date[i].num,

pc->date[i].price);

}

fclose(p1);

Car pf = { 0 };

pf.count = 0;

pf.date = (Peoinfo*)calloc(n, sizeof(Peoinfo));

if (pf.date == NULL)

{

perror("error");

return;

}

FILE* p2 = fopen(arr, "r");

if (p2 == NULL)

{

perror("error");

free(pf.date);

return;

}

for (int i = 0; i < pc->count; i++)

{

fscanf(p2,"%10s %10s %10d", pf.date[i].name, pf.date[i].num, &pf.date[i].price);

pf.count++;

}

fclose(p2);

int low, up;

printf("请输入价格下限和上限\n");

scanf("%d %d", &low, &up);

printf("%10s\t%10s\t%10s\n", "品牌", "型号", "价格");

for (int i = 0; i < pf.count; i++)

{

if (pf.date[i].price > low && pf.date[i].price < up)

{

printf("%10s\t%10s\t%10d\n", pf.date[i].name, pf.date[i].num, pf.date[i].price);

}

}

free(pf.date);

}

void Destroy(Car* pc)

{

assert(pc);

free(pc->date);

pc->date = NULL;

}

void menu()

{

printf("**************************************\n");

printf("***** 1.add           2.dele   *******\n");

printf("***** 3.search        4.show   *******\n");

printf("***** 0.exit                   *******\n");

printf("**************************************\n");

}

int main() {

int input = 0;

Car con;

int n = 0;

printf("请输入你要输入的车的数量\n");

scanf("%d", &n);

con.count = 0;

con.date = (Peoinfo*)calloc(n, sizeof(Peoinfo));

if (con.date == NULL)

{

perror("error");

return 1;

}

do

{

menu();

printf("请选择\n");

scanf("%d", &input);

switch (input)

{

case 1:

AddContact(&con, n);

break;

case 2:

DeleContact(&con);

break;

case 3:

SearchContact(&con);

break;

case 4:

ShowContact(&con);

break;

case 0:

print(&con, n);

Destroy(&con);

printf("已退出\n");

break;

default:

printf("选择错误\n");

break;

}

} while (input);

return 0;

}