1 #include "stdafx.h"
2 #include <stdlib.h>
3 #include <stdio.h>
4 #define N 30
5 typedef struct date
6 {
7 int year;
8 int month;
9 int day;
10 }DATE;
11 typedef struct student
12 {
13 long studentID;
14 char studentName[10];
15 char studentsex;
16 DATE birthday;
17 int score[4];
18 float aver;
19 }STUDENT;
20 int SearchNuminFile(char fileName[],long key);
21 int main()
22 {
23 int n;
24 long key;
25 printf_s("Input the searching ID:");
26 scanf_s("%d",&key,sizeof(key));
27 n = SearchNuminFile("student.txt",key);
28 if(n != -1)
29 printf_s("Record number is %d.\n",n);
30 else
31 printf_s("Not found.\n");
32 return 0;
33 }
34 int SearchNuminFile(char fileName[],long key)
35 {
36 FILE *fp;
37 STUDENT stu[N];
38 int i,j;
39 if(fopen_s(&fp,fileName,"r") == NULL)
40 {
41 printf_s("Failure to open %s!\n",fileName);
42 exit(0);
43 }
44 system("pause");
45 for(i = 0;!feof(fp);i++)
46 {
47 fread(&stu[i],sizeof(STUDENT),1,fp);
48 if(key == stu[i].studentID)
49 {
50 printf_s("%10ld%8s%3c%6d/%02d/%02d",stu[i].studentID,
51 stu[i].studentName,stu[i].studentsex,stu[i].birthday .year,
52 stu[i].birthday.month,stu[i].birthday.day);
53 for(j = 0;j < 4;j++)
54 {
55 printf("%4d",stu[i].score[j]);
56 }
57 printf_s("%6.1f\n",stu[i].aver);
58 fclose(fp);
59 return i+1;
60 }
61 }
62 fclose(fp);
63 system("pause");
64 return -1 ;
65 }
