文件问题
#include <stdio.h>
#include <stdlib.h>
#include "string.h"
typedef struct students
{
char name[20];
char sex;
char phone[9];
int flag;
}stu;

void Input();
void Add();
void Delete();
void Display();
void Seach();

main()
{
int option;
FILE *fp;
printf("**********Please choose the option you want to operate (1/2/3/4)\n\n");
printf(" 1): add a new content\n");
printf(" 2): delete a content\n");
printf(" 3): display all contents\n ");
printf(" 4): seach a content\n ");
printf(" 5): exit.\n");
printf(" Please input the option:");
scanf("%d",&option);
if((fp=fopen("students.txt","w"))==NULL)
{
printf("can't open this file or this file does't exit!");
return;
}
switch(option)
{
case 1 : Add(fp);break;
case 2 : Delete(fp);break;
case 3 : Display(fp);break;
case 4 : Seach(fp);break;
case 5 : return;
default: {
printf("input error! exit.");
return;
}
}
}

void Input(stu *student)
{
printf("\ninput the student name.:");
scanf("%s",student->name);
printf("\ninput the student phone:");
scanf("%s",student->phone);
printf("\ninput the student sex:");
scanf("%c",student->sex);
}

void Add(FILE *fp)
{
int num;
stu student;
num=ftell(fp)/sizeof(stu);
printf("the flag you shuold input:%d\n",num+1);
scanf("%d",&student.flag);
feek(fp,0,2);
Input(&student);
if(fwrite(&student,sizeof(stu),1,fp)!=1)
printf("write error\n");
else
printf("write succse!\n");
fclose(fp);
return;
}

void Delete(FILE *fp)
{
int num;
char ch;
stu play,student={"0",'0',"0",0};
printf("input the num you want to delete:");
scanf("%d",&num);
fseek(fp,sizeof(stu)*(num-1),0);
fread(&play,sizeof(stu),1,fp);
printf("the student's information you want to delete is:\n");
printf("%-20s%2c%2d",play.name,play.sex,play.phone);
printf("Are you sure to delete y/n ?\n");
ch=getch();
if(ch=='n')
{
fclose(fp);
return;
}
else
{
if(fwrite(&student,sizeof(stu),1,fp)!=1)
{
printf("Delete fail \n");
fclose(fp);
}
return;
}

void Display(FILE *fp)
{
int num,i;
rewind(fp);
fseek(fp,0,2);
num=ftell(fp)/sizeof(stu);
rewind(fp);
for(i=0;i<num;i++)
{
fread(&student,sizeof(stu),1,fp);
printf("%-20s%2c%2d",student.name,student.sex,student.phone);
}

fclose(fp);
}

void Seach(FILE *fp)
{
char namea[20],i;
stu student;
printf("Please input the name you want to seach:");
scanf("%s",namea);
rewind(fp);
fseek(fp,0,2);
num=ftell(fp)/sizeof(stu);
rewind(fp);
for(i=0;i<num;i++)
{
fread(&student,sizeof(stu),1,fp);
if(strcmp(student.name,namea)==0)
printf("%20s%2c%2s",student.name,student.sex,student.phone);
}
fclose(fp);
}

编译时总有一个错误:syntax error at end of input


[解决办法]
酷哦,我还从没编过这么长的程序呢,我要加油了
[解决办法]
这个应该不止一个问题吧...好像有很多错...以下代码.我做了点修改...应该勉强能用吧....

C/C++ code

#include  <stdio.h > #include  <stdlib.h > #include  <conio.h> //+++++#include "string.h" typedef struct students {  char name[20];  char sex;  char phone[9];  int flag; }stu; void Input(stu *student); void Add(FILE *fp) ; void Delete(FILE *fp) ; void Display(FILE *fp) ; void Seach(FILE *fp); stu student; //+++++++main() {  int option;  FILE *fp;  printf("**********Please choose the option you want to operate (1/2/3/4)\n\n");  printf("     1): add a new content\n");  printf("     2): delete a content\n");  printf("     3): display all contents\n ");  printf("     4): seach a content\n ");  printf("     5): exit.\n");  printf(" Please input the option:");  scanf("%d",&option);  if((fp=fopen("students.txt","w"))==NULL)     {      printf("can 't open this file or this file does 't exit!");      return;      }  switch(option)     {       case 1 : Add(fp);break;       case 2 : Delete(fp);break;       case 3 : Display(fp);break;       case 4 : Seach(fp);break;       case 5 : return;       default:                   printf("input error! exit.");                  return;      } } void Input(stu *student) {      printf("\ninput the student name.:");    scanf("%s",student->name);    printf("\ninput the student phone:");    scanf("%s",student->phone);    printf("\ninput the student sex:");    scanf("%c",student->sex);    } void Add(FILE *fp) {        int num;     stu student;     num=ftell(fp)/sizeof(stu);     printf("the flag you shuold input:%d\n",num+1);     scanf("%d",&student.flag);     fseek(fp,0,2); //++++++++++    Input(&student);     if(fwrite(&student,sizeof(stu),1,fp)!=1)                 printf("write error\n");                                    else              printf("write succse!\n");             fclose(fp);     return; } void Delete(FILE *fp) {   int num;   char ch;   stu play,student={"0", '0 ',"0",0};   printf("input the num you want to delete:");   scanf("%d",&num);   fseek(fp,sizeof(stu)*(num-1),0);   fread(&play,sizeof(stu),1,fp);   printf("the student 's information you want to delete is:\n");     printf("%-20s%2c%2d",play.name,play.sex,play.phone);   printf("Are you sure to delete y/n ?\n");   ch=getch();    if(ch== 'n ')   {      fclose(fp);      return;   }   else   {       if(fwrite(&student,sizeof(stu),1,fp)!=1)       {         printf("Delete fail \n");             fclose(fp);       }   return; } }//++++++++++++++++++++++++++  void Display(FILE *fp)  {       int num,i;          rewind(fp);      fseek(fp,0,2);      num=ftell(fp)/sizeof(stu);      rewind(fp);      for(i=0;i <num;i++)      {         fread(&student,sizeof(stu),1,fp);         printf("%-20s%2c%2d",student.name,student.sex,student.phone);      }        fclose(fp);  }            void Seach(FILE *fp)  {    char namea[20],i;    stu student;    int num = 0;  //++++++++   printf("Please input the name you want to seach:");    scanf("%s",namea);    rewind(fp);    fseek(fp,0,2);    num=ftell(fp)/sizeof(stu);    rewind(fp);    for(i=0;i <num;i++)    {      fread(&student,sizeof(stu),1,fp);      if(strcmp(student.name,namea)==0)         printf("%20s%2c%2s",student.name,student.sex,student.phone);    }    fclose(fp); } 
 
[解决办法]
学生管理系统～～～～～～

看看老帖子，有很多的
[解决办法]
C/C++ code
void Input(stu *student) //以前面的类型不对应呀,fp是FILE是文件指针,而这里接收的不是文件指针呀{      printf("\ninput the student name.:");    scanf("%s",student- >name);    printf("\ninput the student phone:");    scanf("%s",student- >phone);    printf("\ninput the student sex:");    scanf("%c",student- >sex);    }