13-5.cpp

C程序设计（第3版）程序源代码,提供你最丰富的实际代码

#include <stdlib.h>
#include<stdio.h>
      struct student_type
     {        char name[10];
        int num;
        int age;
        char sex;
     }stud[10];     main()
    {
        int i;
         FILE  *fp;
	if((fp=fopen("stud-dat","rb"))==NULL)
         {printf("can not open file\n");
            exit(0);}
        for(i=0;i<10;i+=2)
         {
          fseek(fp,i*sizeof(struct student_type),0);
          fread(&stud[i], sizeof(struct student_type),1,fp);
          printf("%s %d %d %c\n",stud[i].name,stud[i].num,stud[i].age,stud[i].sex);
          }
        fclose(fp);
       }