简单的姓名号码查询系统

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<stdlib.h>
 4 struct student    //定义结构体
 5 {
 6     char name[7];   //姓名
 7     int number;     //号码
 8 }student,student1;
 9 void menu()    //显示栏
10 {
11     printf("***********************\n");
12     printf("1 input record\n");
13     printf("2 search record\n");
14     printf("0 quit system\n");
15 }
16 void save()  //输入函数
17 {
18    FILE *fp;
19     system("cls");  //清屏
20     fp=fopen("filename","a+");
21     if(fp==NULL)
22     {
23         printf("open file error");
24         exit(1);
25     }
26     while(1)
27     {
28         scanf("%s%d",student.name,&student.number);   //输入姓名及号码
29         fwrite(&student,sizeof(struct student),1,fp);
30         printf("continue?(y/n)");  //是否继续
31         getchar();
32         if(getchar()=='n')  break;
33     }
34     fclose(fp);
35     exit(0);
36 }
37 void search()//查找函数
38 {
39 
40      FILE *fp;
41      char name[7];
42     system("cls");//清屏
43     if((fp=fopen("filename","r"))==NULL)
44     {
45         printf("open the file error");
46         exit(1);
47     }
48     printf("please int your name\n");
49     scanf("%s",name);
50     while(fread(&student1,sizeof(struct student),1,fp)==0)//查找
51     {
52         if(strcmp(student1.name,name)==0)
53         {
54             printf("%s  %d",student1.name,student1.number);//显示所查找的姓名以及号码
55             break;
56         }
57     }
58     if(feof(fp))//检测文件指针指向文件是否结束
59     {
60         printf("search fail");//若结束则输出查找失败
61         exit(0);
62     }
63 }
64 int main()//主函数
65 {
66     int select;
67     menu();//显示主菜单
68     printf("\nPlease enter your select\n");
69     scanf("%d",&select);
70     while(select)
71     {
72         switch(select)
73         {
74             case 1:save();break;
75             case 2:search();break;
76             case 0:exit(1);
77         }
78     }
79 }