8-3.c

《linux应用开发技术详解》的配套代码

#include <stdio.h>
struct student {
            char name[10];
            int age;
          };
int main()
{
    FILE *fp;
    int i;
    struct student boya[2], boyb[2], *pp, *qq;
    if((fp = fopen("8-3.txt","w+"))== NULL)   		//打开文件
      {
          printf("Can not open file, exit ...\n");
          return -1;
      }
    pp = boya;
    qq = boyb;
    printf("please input data:\n");					//输入学生信息
    for (i = 0; i < 2; i++, pp++)
        scanf("%s%d", pp->name, &pp->age);
    pp = boya;
    fwrite(pp, sizeof(struct student), 2, fp); 			//把学生信息写入文件
    rewind(fp); 							//重定位文件
    fread(qq, sizeof(struct student), 2, fp); 			//从文件中读取学生信息
    printf("name\t\tage\n");
    for(i = 0; i < 2; i++, qq++)
        printf("%s\t\t%d\n", qq->name, qq->age);
    fclose(fp);
    return 0;
}