Question

C#考试用!急~混分别来~留下详细过程！

64. 用FileStream 打开一个文件时，可用FileShare 参数控制：
A. 对文件执行覆盖、创建、打开等选项中的哪些操作；
B. 对文件进行只读、只写还是读/写
C. 其他FileStream 对同一个文件所具有的访问类型
D. 对文件进行随机访问时的定位参考点

Answer 1

这是个人制作的管理系统源文件——有文件的读写，不知道能不能帮到。——交流（不好请指教）

#include "stdio.h"
#include "conio.h"
#define ID ID
typedef struct node /*定义结构体*/
{ char ming[50]; /*名字*/
char xing[50]; /*性别*/
char nian[50]; /*年龄*/
int xuehao; /*学号*/
char xibie[50]; /*专业*/
char sushe[50]; /*宿舍号*/
char jia[50]; /*家庭地址*/

struct node *next;
}ID; /*学生信息（变量名）*/
ID *head=NULL; /*定义一个头指针*/
FILE *zhi; /*定义一个文件指针*/

void stubent187()

{printf("****************************************************************\n");
printf("* 学生信息管理系统 *\n");
printf("* *\n");
printf("* 请选择：1:查看; 2:添加; 3:删除; *\n");
printf("* 4:修改; 0:退出系统 *\n");
printf("* *\n");
printf("****************************************************************\n");
printf(">>>>>>>>>>>>>>>>>>>>>>>>输入 0~4 数字<<<<<<<<<<<<<<<<<<<<<<<<<\n");

return ;
}

void chakan()
{ /* 查看*/
ID *t;
t=head;
t=(ID *)malloc(sizeof(ID)); /*为t开辟一个新单元*/
if((zhi=fopen("yihu1.txt","rb"))==NULL) printf("没有此文件\n");

else
{ printf("%10s%10s%10s%10s%10s%10s%10s\n","ming","xing","nian","xuehao","eng","sushe","jia");
while (!feof(zhi))
{
fscanf(zhi,"%10s%10s%10s%10d%10s%10s%10s\n",&t->ming,&t->xing,&t->nian,&t->xuehao,&t->xibie,&t->sushe,&t->jia);

printf("%10s%10s%10s%10d%10s%10s%10s\n",t->ming,t->xing,t->nian,t->xuehao,t->xibie,t->sushe,t->jia);
t->next=(ID *)malloc(sizeof(ID));t=t->next;
}
};

}

void add()
{
char i; /*添加*/
ID *t1,*t2;
t1=t2=NULL;
loop: t1=(ID *)malloc(sizeof(ID)); /*为t1开辟一个新单元*/
printf("请输入姓名:");scanf("%s",&t1->ming); /* 姓名 */
printf("请输入性别:");scanf("%s",&t1->xing); /* 性别 */
printf("请输入年龄:");scanf("%s",&(t1->nian)); /* 年龄 */
printf("请输入学号:");scanf("%d",&(t1->xuehao)); /* 学号 */
printf("请输入系别:");scanf("%s",&(t1->xibie)); /*系别*/
printf("请输入宿舍号:");scanf("%s",&(t1->sushe)); /*宿舍号*/
printf("请输入家庭地址:");scanf("%s",&(t1->jia)); /*家庭地址*/
t1->next=NULL;
if (head==NULL) /*如果头结点为空*/
{ head=t1; /*t1指向头结点*/
t2=t1;
}
else {

t2=head;
while (t2->next!=NULL) t2=t2->next;
t2->next=t1;
} getchar();
printf("是否继续添加(Y/N):\n");
scanf("%s",&i);
if(i=='y'||i=='Y')
{clrscr(); goto loop;
}
else {printf("是否保存此次添加(Y/N)\n");scanf("%s",&i);
if(i=='y'||i=='Y')
{baocun();
clrscr();
stubent187();
printf("保存成功");
}

else if(i=='n'||i=='N')
{
clrscr();
stubent187();}
}
return ;
}

void del()
{ /*删除*/
ID *A,*B;
char t,i;int xuehao;
A=B=NULL;
if((zhi=fopen("yihu1.txt","a+"))==NULL) printf("没有此信息文件\n");
else
{ loop: printf("请输入要删除的学生学号:");scanf("%d",&xuehao);
while (!feof(zhi))
{ fscanf(zhi,"%10s%10s%10s%10d%10s%10s%10s\n",&A->ming,&A->xing,&A->nian,&A->xuehao,&A->xibie,&A->sushe,&A->jia);
if(A!=NULL && A->xuehao!=xuehao)

A=A->next;
else break;

}

if (A->xuehao==xuehao)
{ head=A->next;
free(*A);
printf("成功!\n");
printf("是否继续删除(Y/N)");scanf("%s",&i);
if(i=='y'||i=='Y')
{clrscr(); goto loop;
}
if(i=='n'||i=='N')
printf("是否保存此次删除(Y/N)\n");scanf("%s",&i);
if(i=='y'||i=='Y')
baocun();
else
clrscr();
stubent187();
}
else printf("无法找到此编号\n");

}
}

void xiugai()
{ /*修改*/
ID *t1,*t2;
int i;char xuehao;
t1=head;
if((zhi=fopen("yihu1.txt","a+"))==NULL) printf("没有此信息文件\n");
loop: t1=(ID *)malloc(sizeof(ID));
printf("请输入要修改的学号:");scanf("%s",&xuehao); /* 输入编号*/
while (!feof(zhi))
{fscanf(zhi,"%10s%10s%10s%10d%10s%10s%10s\n",&t1->ming,&t1->xing,&t1->nian,&t1->xuehao,&t1->xibie,&t1->sushe,&t1->jia);
if(t1!=NULL && t1->xuehao!=xuehao)
t1=t1->next;
else break;
}
if (t1->xuehao==xuehao)
{ fprintf(zhi,"%10s%10s%10s%10d%10s%10s%10s\n",t1->ming,t1->xing,t1->nian,t1->xuehao,t1->xibie,t1->sushe,t1->jia);
printf("输入名字:");scanf("%s",&t1->ming); /*名字*/
printf("输入性别:");scanf("%s",&(t1->xing)); /*性别*/
printf("输入年龄:");scanf("%s",&(t1->nian)); /*年龄*/
printf("输入学号:");scanf("%s",&t1->xuehao); /*学号*/
printf("输入系别:");scanf("%s",&(t1->xibie)); /*系别*/
printf("输入专业:");scanf("%s",&(t1->sushe)); /* 宿舍号 */
printf("输入家庭地址:");scanf("%s",&(t1->jia)); /* 家庭地址*/
printf("成功!\n");
printf("是否继续修改(Y/N)");scanf("%d",&i);
if(i=='y'||i=='Y')
{clrscr(); goto loop;
}
if(i=='n'||i=='N')
printf("是否保存此次修改(Y/N)\n");scanf("%c",&i);
if(i=='y'||i=='Y')
baocun();
else
clrscr();
stubent187();
}
else printf("没有此编号\n");

return;
}

baocun() /*保存*/
{
ID *t=head;
zhi=fopen("yihu1.txt","a+"); /*(读写 yihu.txt文本) */
while (t!=NULL){
fprintf(zhi,"%10s%10s%10s%10d%10s%10s%10s\n",t->ming,t->xing,t->nian,t->xuehao,t->xibie,t->sushe,t->jia);
t=t->next;

}
fclose(zhi); /*关闭此文件*/
printf("成功！\n");
return ;
}

main()
{
int i;
stubent187();
while(1)
{
scanf("%d",&i);

switch(i)
{ case 1:chakan();break;
case 2:add();break;
case 3:del();break;
case 4:xiugai();break;
case 0:exit(0);
default:printf("输入错误，请在此输入\n");continue;
}

}
}

追问

实话～我是帮恋人发的～我也不知道啊～

追答

那你给她看看，要是能帮到（推个最佳，谢谢）

Answer 2

没分 混个P啊