C语言：用二进制方式向文件读写一组数据(fread、fwrite)

1. #include<stdio.h>
2. #define SIZE 10
3. struct student
4. {
5. char name[10];
6. int num;
7. int age;
8. char addr[15];
9. }stu[SIZE];
10. //保存数据(fwrite)
11. void save()
12. {
13. FILE *fp;
14. fp = fopen("stu.dat","wb");
15. if(fp==NULL)
16. {
17. printf("file can not open!\n");
18. return;
19. }
20. for(int i=0;i<SIZE;i++)
21. {
22. if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)
23. {
24. printf("file write error!\n");
25. }
26. }
27. fclose(fp);
28. }
29. //读取数据(fread)
30. void load()
31. {
32. FILE *fp;
33. fp = fopen("stu.dat","rb");
34. if(fp==NULL)
35. {
36. printf("file can not open!\n");
37. return;
38. }
39. for(int i=0;i<SIZE;i++)
40. {
41. if(fread(&stu[i],sizeof(struct student),1,fp)!=1)
42. {
43. if(feof(fp))
44. {
45. fclose(fp);
46. return;
47. }
48. printf("file read error!\n");
49. }
50. printf("%-10s %4d %4d %-15s\n",stu[i].name,stu[i].num,stu[i].age,stu[i].addr);
51. }
52. fclose(fp);
53. }
54. int main()
55. {
56. printf("Please enter data of students:\n");
57. for(int i=0;i<SIZE;i++)
58. {
59. scanf("%s%d%d%s",stu[i].name,&stu[i].num,&stu[i].age,stu[i].addr);
60. }
61. save();
62. load();
63. return 0;
64. }