问题遇到的现象和发生背景
```c
void modify() { //修改函数
FILE *fp;
fp=fopen("D:\通讯录.txt","r");
if(fp==0) {
printf("十分抱歉,文件失踪啦(ㄒoㄒ)\n");
exit(1);
}
int i;
char modname[20];
int y=0;
printf("请输入你要修改的人名:\n");
scanf("%s",&modname);
while(!feof(fp)) {
fscanf(fp,"%s%s%s%s%s%s%s\n",s[i].id,s[i].name,s[i].move,s[i].home,s[i].office,s[i].mailbox,s[i].group);
if(strcmp(modname,s[i].name)==0) {
y=1;
break;
}
i++;
}
if(y==0) {
printf("没有此人∑(O_O;)\n");
} else {
printf("已找到的修改人名的所有的信息如下:\n");
puts(title);
printf("%9s %9s %16s %16s %16s %16s %16s\n",s[i].id,s[i].name,s[i].move,s[i].home,s[i].office,s[i].mailbox,s[i].group);
printf("确定修改按4 \n");
printf("放弃修改按任意数字键\n");
int r;
scanf("%r\n",&r);
if(r==4) {
char Newname[20];
printf("请输入你要修改的新名字:\n");
scanf("%s",&Newname);
strcpy(s[i].name,Newname);
char Newmove[20];
printf("请输入你要修改的新移动电话号码:\n");
scanf("%s",&Newmove);
strcpy(s[i].name,Newmove);
char Newhome[20];
printf("请输入你要修改的新移动电话号码:\n");
scanf("%s",&Newhome);
strcpy(s[i].name,Newhome);
char Newoffice[20];
printf("请输入你要修改的新办公室电话号码:\n");
scanf("%d",&Newoffice);
strcpy(s[i].office,Newoffice);
char Newmailbox[20];
printf("请输入你要修改的新邮箱:\n");
scanf("%s",&Newmailbox);
strcpy(s[i].mailbox,Newmailbox);
char Newgroup[20];
printf("分组有未知、同事、亲戚、朋友、家人、同学,或者您可以自编分组名,请输入您要修改的分组:\n");
scanf("%s",&Newgroup);
strcpy(s[i].group,Newgroup);
printf("修改成功!\n");
printf("修改后的手机通讯录如下:\n");
print();
}
}
fclose(fp);
}
```问题相关代码,请勿粘贴截图