#include <stdio.h>
struct stu
{
    char name[10];
    int num;
    int age;
    char addr[15];

}boya[3],boyb[3],*pp,*qq;
main()
{
    FILE *fp;
    char ch;
    int i;
    if((fp=fopen("stu_list.txt","w+"))==NULL)
    {
        printf("cannot open the file");
        getch();
        exit(0);
    }
    printf("\ninput data\n");
        pp=boya;
    for(i=0;i<3;i++,pp++)
    {
        scanf("s%d%d%s",pp->name,&pp->name,&pp->age,pp->addr);
        fprintf(fp,"%s %d %d %s\n",pp->name,pp->num,pp->num,pp->age,pp->addr);
    }
    rewind(fp);
    qq=boyb;
    printf("\n\nname\tnumer age addr\n");
        for(i=0;i<3;i++,qq++)
        {
            fscanf(fp,  "%s %d %d %s\n",qq->name ,&qq->num,&qq->age,qq->addr);
            fprintf("%s\t%5d %7d %s\n",qq->name,qq->num,qq->age,qq->addr );

        }
        fclose(fp);
}
//不能运行，跪求高手指点