c - c代码中的错误

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谁能帮我解决以下错误...

1>------ Build started: Project: 1, Configuration: Debug Win32 ------
1>  1.cpp
1>c:\users\santosh\documents\visual studio 2010\projects\1\1\1.cpp(28): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\users\santosh\documents\visual studio 2010\projects\1\1\1.cpp(31): error C3861: 'toupper': identifier not found
1>c:\users\santosh\documents\visual studio 2010\projects\1\1\1.cpp(31): fatal error C1903: unable to recover from previous error(s); stopping compilation
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

下面是代码:

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <process.h>
FILE *q,*h,*idd;
FILE *reg,*log;

struct question           /* Structure Question */
{
  char ques[200];
  int id;
  char op1[200];
  char op2[200];
  char op3[200];
  char op4[200];
  char ans;
}qe,t1;

struct user
{
  char name[100];
  char id[100];
  char password[100];
  int log;
}usr;

addq()
{
  char ch,an='Y';
  int id1,f,flag;
  while (toupper(an)=='Y')
  {
    clrscr();
    printf ("ENTER AN ID TO THE QUESTION : ");
    rewind(q);
    printf ("
ENTER THE QUESTION : ");
    printf ("



ENTER OPTION 1 : ");
    printf ("
ENTER OPTION 2 : ");
    printf ("
ENTER OPTION 3 : ");
    printf ("
ENTER OPTION 4 : ");
    printf ("
ENTER THE ANSWER NUMBER : ");
    enid : flag = 0;
    while (flag==0)
    {
      id1 = NULL;
      gotoxy (31,1);
      flag = scanf ("%d",&id1);
    }
    rewind(q);
    while (fread(&qe,sizeof(qe),1,q)==1)
    {
      if (qe.id==id1)
      {
    textcolor(-3);
    gotoxy (10,15);
    cprintf ("ID NUMBER IS REPEATED ");
    getch();
    gotoxy(10,15);
    clreol();
    textcolor (7);
    cprintf (" ");
    goto enid;
      }
    }
    qe.id = id1;
    flushall();
    enqe : gotoxy (22,2);
    gets(qe.ques);
    if (strlen(qe.ques)<=2)
    {
      gotoxy (10,15);
      textcolor (-4);
      cprintf ("INVALID QUESTION. PLEASE ENTER IT AGAIN");
      textcolor (7);
      getch();
      gotoxy (10,15);
      printf ("                                        ");
      goto enqe;
    }
    flushall();
    enop1 : gotoxy(18,6);
    gets(qe.op1);
    if (strlen(qe.op1)<1)
    {
      gotoxy (10,15);
      textcolor (-5);
      cprintf ("AN OPTION FIELD CANNOT BE EMPTY");
      getch();
      gotoxy (10,15);
      cprintf ("                              ");
      textcolor(7);
      cprintf (" ");
      goto enop1;
    }
    flushall();
    enop2 : gotoxy(18,7);
    gets(qe.op2);
    if (strlen(qe.op2)<1)
    {
      gotoxy (10,15);
      textcolor (-5);
      cprintf ("AN OPTION FIELD CANNOT BE EMPTY");
      getch();
      gotoxy (10,15);
      textcolor (7);
      cprintf ("                               ");
      goto enop2;
    }
    flushall();
    enop3 : gotoxy(18,8);
    gets(qe.op3);
    if (strlen(qe.op3)<1)
    {
      gotoxy (10,15);
      textcolor (-5);
      cprintf ("AN OPTION FIELD CANNOT BE EMPTY");
      getch();
      textcolor (7);
      gotoxy (10,15);
      cprintf ("                               ");
      goto enop3;
    }
    flushall();
    enop4 : gotoxy(18,9);
    gets(qe.op4);
    if (strlen(qe.op4)<1)
    {
      gotoxy (10,15);
      textcolor (-5);
      cprintf ("AN OPTION FIELD CANNOT BE EMPTY");
      getch();
      textcolor(7);
      gotoxy (10,15);
      cprintf ("                               ");
      goto enop4;
    }
    flushall();

    enans : gotoxy(27,10);
    qe.ans = getchar();
    if (qe.ans!='1' && qe.ans!='2' && qe.ans!='3' && qe.ans!='4')
    {
      gotoxy (10,15);
      textcolor (-3);
      cprintf ("ANSWER MUST BE ONLY 1 OR 2 OR 3 OR 4. INPUT ERROR");
      getch();
      gotoxy (10,15);
      textcolor(7);
      cprintf ("                                                 ");
      goto enans;
    }
    flushall();
    fwrite (&qe,sizeof(qe),1,q);
    printf ("

ADD ANOTHER QUESTION (Y/N) : ");
    an = getche();
  }
}

test()
{
  int i=0,j=0;
  clrscr();
  rewind(q);
  textcolor(7);
  cprintf ("");
  while (fread(&qe,sizeof(qe),1,q)==1)
  {
    j++;
  }
  if (j!=0)
  {
  rewind(q);
  while (fread(&qe,sizeof(qe),1,q)==1)
  {
    clrscr();
    i++;
    printf ("QUESTION %d/%d",i,j);
    viewrec1(&qe);
    getch();
  }
  }
  else
  {
    clrscr();
    printf ("NO RECORDS IN THE FILE Q.DAT");
  }

  printf ("

TOTAL QUESTIONS LISTED : %d",i);
  getch();
}

delq()
{
  int id1,i,j=0,k,flag=0;
  char an='Y';
  FILE *t;
  rewind(q);
  while (fread(&qe,sizeof(qe),1,q)==1)
  {
   j++;
  }
  if (j==0)
  {
    clrscr();
    gotoxy (20,10);
    printf ("NO RECORDS TO DELETE");
    gotoxy (20,11);
    printf ("The file Q.DAT is empty");
    getch();
    return;
  }
  while (toupper(an)=='Y')
  {
    clrscr();
    flag=0;
    printf ("ENTER THE QUESTION ID TO BE DELETED : ");
    scanf ("%d",&id1);
    rewind(q);
    while (fread(&qe,sizeof(qe),1,q)==1)
    {
      if (id1==qe.id)
      {
    flag=1;
    break;
      }
    }
    rewind(q);
    if (flag==1)
    {
      unlink ("TEMP.DAT");
      t = fopen("TEMP.DAT","ab+");
      while (fread(&qe,sizeof(qe),1,q)==1)
      {
    if (id1!=qe.id)
    {
      fwrite (&qe,sizeof(qe),1,t);
    }
      }
      rewind (t);
      fclose (q);
      unlink ("Q.DAT");
      q = fopen ("Q.DAT","ab+");
      if (q==NULL)
      {
    printf ("

UNABLE TO CREATE Q.DAT.");
    getch();
    fclose(q);
    fclose(h);
    fclose(t);
    exit(0);
      }
      while (fread(&qe,sizeof(qe),1,t)==1)
      {
     fwrite (&qe,sizeof(qe),1,q);
      }
      fclose (t);
      printf ("
DO YOU WANT TO DELETE ANOTHER RECORD (Y/N) : ");
      an = getche();
    }
    if (flag!=1)
    {
      printf ("
ID NUMBER %d NOT FOUND",id1);
      printf ("
DO YOU WANT TO DELETE ANOTHER RECORD (Y/N) : ");
      an = getche();
    }
  }
}


reg1()
{
 int nrec=0,flag=0;
 char password[100],usrid[100];
 rewind(reg);
 while (fread(&usr,sizeof(usr),1,reg)==1)
 {
   nrec++;
 }
 clrscr();
 printf ("ENTER YOUR FULL NAME   : ");
 printf ("
ENTER DESIRED USERNAME : ");
 printf ("
ENTER PASSWORD         : ");
 gotoxy (26,1);
 gets(usr.name);
 enusrid : gotoxy (26,2);
 gets(usrid);
 rewind (reg);
 while (fread(&usr,sizeof(usr),1,reg)==1)
 {
   flag=0;
   if (strcmp(usrid,usr.id)==0)
   {
     flag = 1;
     break;
   }
 }
 if (flag==1 || strlen(usrid)<2)
 {
   gotoxy (1,5);
   textcolor (-3);
   cprintf ("This USER ID is already in use by someone");
   gotoxy (1,6);
   cprintf ("Please Choose another one");
   getch();
   gotoxy (1,5);
   clreol();
   gotoxy (1,6);
   clreol();
   textcolor (7);
   cprintf ("");
   gotoxy (26,2);
   clreol();    /* CLREOL() --> THIS FUNCTIONS CLEARS A LINE */
   textcolor (7);
   cprintf ("");
   goto enusrid;
 }
 gotoxy (26,3);
 gets(usr.password);
 strcpy(usr.id,usrid);
 fseek(reg,0,SEEK_END);
 fwrite (&usr,sizeof(usr),1,reg);
}









modq()
{
  int id1;
  int flag=0;
  char an='Y',ch;
  FILE *t;
  while (toupper(an)=='Y')
  {
    clrscr();
    flag=0;
    textcolor(GREEN);
    gotoxy (10,12);
    cprintf ("
ENTER THE RECORD ID TO BE MODIFIED : ");
    textcolor(7);
    cprintf ("");
    scanf ("%d",&id1);
    rewind(q);
    while (fread(&qe,sizeof(qe),1,q)==1)
    {
      if (id1==qe.id)
      {
    clrscr();
    flag=1;
    textcolor(LIGHTRED);
    gotoxy (1,1);
    cprintf ("DETAILS OF CURRENT RECORD NUMBER %d : ",id1);
    textcolor(GREEN);
    gotoxy(20,10);
    cprintf ("QUESTION : ");
    textcolor (CYAN);
    cprintf ("%s",qe.ques);
    gotoxy (20,12);
    textcolor (GREEN);
    cprintf ("OPTION 1 : ");
    textcolor(CYAN);
    cprintf ("%s",qe.op1);
    gotoxy (20,13);
    textcolor (GREEN);
    cprintf ("OPTION 2 : ");
    textcolor(CYAN);
    cprintf ("%s",qe.op2);
    gotoxy (20,14);
    textcolor (GREEN);
    cprintf ("OPTION 3 : ");
    textcolor (CYAN);
    cprintf ("%s",qe.op3);
    textcolor(GREEN);
    gotoxy (20,15);
    cprintf ("OPTION 4 : ");
    textcolor (CYAN);
    cprintf ("%s",qe.op4);
    gotoxy (20,16);
    textcolor (GREEN);
    cprintf ("ANSWER   : ");
    textcolor (CYAN);
    cprintf ("%c",qe.ans);
    getch();
    textcolor(7);
    cprintf ("");
    printf ("

Press any key to modify this record...");
    break;
      }
    }
    clrscr();
    if (flag==1)
    {
      sure : 
      printf ("

Are you sure that you want to modify this record (Y/N) : ");
      ch = getche();
      switch(toupper(ch))
      {
    case 'Y' :  clrscr();
        printf ("ENTER AN ID TO THE QUESTION : %d",id1);
        rewind(q);
        printf ("
ENTER THE QUESTION : ");
        printf ("



ENTER OPTION 1 : ");
        printf ("
ENTER OPTION 2 : ");
        printf ("
ENTER OPTION 3 : ");
        printf ("
ENTER OPTION 4 : ");
        printf ("
ENTER THE ANSWER NUMBER : ");

        t1.id = id1;
        flushall();
        enqe1 : gotoxy (22,2);
        gets(t1.ques);
        if (strlen(t1.ques)<=2)
        {
          gotoxy (10,15);
          textcolor (-4);
          cprintf ("INVALID QUESTION. PLEASE ENTER IT AGAIN");
          textcolor (7);
          getch();
          gotoxy (10,15);
          printf ("                                        ");
          goto enqe1;
        }
        flushall();
        enop11 : gotoxy(18,6);
        gets(t1.op1);
        if (strlen(t1.op1)<1)
        {
          gotoxy (10,15);
          textcolor (-5);
          cprintf ("AN OPTION FIELD CANNOT BE EMPTY");
          getch();
          gotoxy (10,15);
          cprintf ("                              ");
          textcolor(7);
          cprintf (" ");
          goto enop11;
        }
        flushall();
        enop21 : gotoxy(18,7);
        gets(t1.op2);
        if (strlen(t1.op2)<1)
        {
          gotoxy (10,15);
          textcolor (-5);
          cprintf ("AN OPTION FIELD CANNOT BE EMPTY");
          getch();
          gotoxy (10,15);
          textcolor (7);
          cprintf ("                               ");
          goto enop21;
        }
        flushall();
        enop31 : gotoxy(18,8);
        gets(t1.op3);
        if (strlen(t1.op3)<1)
        {
          gotoxy (10,15);
          textcolor (-5);
          cprintf ("AN OPTION FIELD CANNOT BE EMPTY");
          getch();
          textcolor (7);
          gotoxy (10,15);
          cprintf ("                               ");
          goto enop31;
        }
        flushall();
        enop41 : gotoxy(18,9);
        gets(t1.op4);
        if (strlen(t1.op4)<1)
        {
          gotoxy (10,15);
          textcolor (-5);
          cprintf ("AN OPTION FIELD CANNOT BE EMPTY");
          getch();
          textcolor(7);
          gotoxy (10,15);
          cprintf ("                               ");
          goto enop41;
        }
        flushall();

        enans1 : gotoxy(27,10);
        t1.ans = getchar();
        if (t1.ans!='1' && t1.ans!='2' && t1.ans!='3' && t1.ans!='4')
        {
          gotoxy (10,15);
          textcolor (-3);
          cprintf ("ANSWER MUST BE ONLY 1 OR 2 OR 3 OR 4. INPUT ERROR");
          getch();
          gotoxy (10,15);
          cprintf ("                                                 ");
          goto enans1;
        }
        flushall();
        unlink("TEMP.DAT");
        t = fopen("TEMP.DAT","ab+");
        t1.id = id1;
        rewind(q);
        while (fread(&qe,sizeof(qe),1,q)==1)
        {
          if (id1!=qe.id)
          {
    fwrite (&qe,sizeof(qe),1,t);
          }
          if (id1==qe.id)
          {
    fwrite (&t1,sizeof(t1),1,t);
          }
        }
        rewind(t);

        fclose(q);
        unlink("Q.DAT");
        q = fopen("Q.DAT","ab+");
        while (fread(&qe,sizeof(qe),1,t)==1)
        {
          fwrite(&qe,sizeof(qe),1,q);
        }
        fclose(t);
        unlink ("TEMP.DAT");
        printf ("

 Record modified...");
        break;
      case 'N' : break;
      default : goto sure;
    }
    }
    else
    {
    printf ("RECORD ID %d NOT FOUND ",id1);
    }


    printf ("

Do you want to modify another record (Y/N) : ");
    an = getche();
  }
}

viewrec1 (struct question *q1,int a)
{
  printf ("
");
  textcolor (BROWN);
  cprintf ("Q.ID : %d",q1->id);
  printf ("

");
  textcolor (LIGHTRED);
  cprintf ("QUESTION : %s",q1->ques);
  printf ("

");
  textcolor(LIGHTCYAN);
  cprintf ("1. %s",q1->op1);
  printf ("
");
  cprintf ("2. %s",q1->op2);
  printf ("
");
  cprintf ("3. %s",q1->op3);
  printf ("
");
  cprintf ("4. %s",q1->op4);
  if (a==1)
  {
    printf ("

");
    textcolor (YELLOW);
    cprintf ("ANSWER : %c",q1->ans);
    textcolor (7);
    cprintf ("");
  }
  textcolor(7);
  cprintf ("");
}


viewrec(int id1,int a)    
/* 
    FUNCTION WHICH DISPLAYS A PARTICULAR RECORD
*/
{
  int found=0;
  idd = q;
  rewind(idd);
  gotoxy(1,25);
  printf ("OmDev Softwares Pvt. Ltd.");
  gotoxy(1,1);
  while(fread(&qe,sizeof(qe),1,idd)==1)
  {
    if (id1==qe.id)
    {
      found = 1;
      printf ("
");
      textcolor (BROWN);
      cprintf ("Q.ID : %d",qe.id);
      textcolor (LIGHTRED);
      printf ("

");
      cprintf ("QUESTION : %s",qe.ques);
      printf ("

");
      textcolor (LIGHTCYAN);
      cprintf ("1. %s",qe.op1);
      printf ("
");
      cprintf ("2. %s",qe.op2);
      printf ("
");
      cprintf ("3. %s",qe.op3);
      printf ("
");
      cprintf ("4. %s",qe.op4);
      if (a==1)
      {
    textcolor (YELLOW);
    printf ("

");
    cprintf ("ANSWER : %c",qe.ans);
    textcolor (7);
    cprintf ("");
      }
    }
  }
  if (found==0)
  {
    printf ("
RECORD NOT FOUND");
    getch();
  }
}

test1()
{
  char ch,an='Y';
  int i;
  do
  {
    clrscr();
    gotoxy (1,25);
    printf ("OmDev Softwares Pvt. Ltd.");
    gotoxy (28,8);
    printf ("1.ADD RECORDS");
    gotoxy (28,9);
    printf ("2.DELETE RECORDS");
    gotoxy (28,10);
    printf ("3.MODIFY RECORDS");
    gotoxy (28,11);
    printf ("4.VIEW ");
    gotoxy (28,12);
    printf ("0.RETURN TO PREVIOUS MENU");
    gotoxy (28,14);
    printf ("ENTER YOUR CHOICE : ");
    ch = getche();
    switch(ch)
    {
       case '1' : addq();
      break;
       case '2' : delq();
      break;
       case '3' : modq();
      break;
       case '4' : clrscr();
      viewmenu();
      break;
       case '5' : clrscr();
      gotoxy (1,25);
      printf ("OmDev Softwares Pvt. Ltd.");
      gotoxy (10,10);
      printf ("ENTER RECORD ID TO BE VIEWED : ");
      scanf ("%d",&i);
      viewrec(i,1);
      getch();
      break;
       case '0' : an='N';
    }
  }while(an=='Y');
}

viewmenu()  /*DISPLAYS VIEWMENU */
{
  char ch;
  int i;
  char an='Y';
  do
  {
    clrscr();
    textcolor (7);
    cprintf ("");
    gotoxy (28,10);
    textcolor(7);
    cprintf ("");
    gotoxy(1,25);
    printf ("OmDev Softwares Pvt. Ltd.");
    printf ("1.VIEW ALL RECORDS");
    gotoxy (28,11);
    printf ("2.VIEW A PARTICULAR RECORD");
    gotoxy (28,12);
    printf ("0.RETURN TO PREVIOUS MENU");
    gotoxy (28,14);
    printf ("ENTER YOUR CHOICE : ");
    ch = getche();
    switch(ch)
    {
      case '1' : test();
     break;
      case '2' : clrscr();
     gotoxy(1,25);
     printf ("OmDev Softwares Pvt. Ltd.");
     gotoxy(1,1);
     printf ("ENTER THE RECORD ID TO BE VIEWED : ");
     scanf ("%d",&i);
     viewrec(i,0);
     getch();
     break;
      case '0': an='N';
    }
  }while(an=='Y');
}

char usrname1[100],usr1[100];

conduct()
{
  char ans,temp;
  int i,j,k,nrec=0,qno=0,cond=1;
  int score=0,qualify;
  rewind(q);
  clrscr();
  while (fread(&qe,sizeof(qe),1,q)==1)
  {
    nrec++;
  }
  if (nrec<=0)
  {
    clrscr();
    gotoxy(1,25);
    printf ("OmDev Softwares Pvt. Ltd.");
    gotoxy (28,11);
    printf ("NO RECORDS TO PLAY QUIZ");
    gotoxy (28,12);
    printf ("Build Database and start playing");
    gotoxy (28,13);
    printf ("Press any key to continue...");
    getch();
    return;
  }

  printf ("
TOTAL NUMBER OF QUESTIONS ARE : %d",nrec);
  printf ("
YOUR MAXIMUM SCORE WILL BE    : %d",nrec);
  qualify = nrec*(0.75);
  printf ("
QUALIFYING MARK               : %d",qualify);
  printf ("

Press any key to start quiz...");
  gotoxy(1,25);
  printf ("OmDev Softwares Pvt. Ltd.");
  getch();
  flushall();
  clrscr();    /*viewrec1(struct *,0);*/
  rewind(q);
  while (fread(&qe,sizeof(qe),1,q)==1)
  {
    clrscr();
    gotoxy(40,1);
    {
      textcolor(LIGHTGRAY);
      cprintf ("CURRENTLY LOGGED : %s",usr1);
    }
    gotoxy (1,1);
    printf ("YOUR SCORE : %d",score);
    qno++;
    printf ("
QUESTION NUMBER : %d
",qno);
    viewrec1(&qe,0);
    printf ("

");
    textcolor (LIGHTMAGENTA);
    cprintf ("ENTER YOUR ANSWER : ");
    scanf ("%c",&ans);
    flushall();
    flushall();
    cond++;
    if (cond>=4)
    {
      cond=0;
    }
    if (ans==qe.ans)
    {
      score++;
      if (cond==1)
      {
    printf ("

");
    printf ("So, r u thinking that ur answer is right (Y/N) : ");
    temp = getche();
    switch(toupper(temp))
    {
case 'Y' : 
printf ("

U r absolutely correct.
Really confidence builds a man");
getch();
break;
case 'N' : printf ("
Hey, be confindent.
You are right...!");
getch();
break;
default : printf ("
Hey, dont get confused. You are right");
getch();
break;
    }
      }
      if (cond==2)
      {
    printf ("

Hmmmmm...Thinking of your answer");
    sleep(2);
    printf ("
YES, U R CORRECT!!!");
    getch();
      }
      if (cond==3)
      {
    printf ("

Be cool. I am processing your answer");
    sleep(2);
    printf ("
hmmmmmm...YES, U R RIGHT. Hurray!!!!");
    getch();
      }
      if (cond==4)
      {
    printf ("

Yes, your answer is absolutely correct");
    getch();
      }
    }
    else
    {
      score=score+0;
      if (cond==1)
      {
    printf ("

I am sorry to say....");
    printf ("
Your guess is wrong");
    getch();
      }
      if (cond==2)
      {
    sleep(2);
    printf ("

Just now we processed ur result.
But, u r wrong");
    getch();
      }
      if (cond==3)
      {
    sleep(2);
    printf ("

All the best to the next question...");
    printf ("
Sorry 2 say that ur answer is wrong");
    getch();
      }
      if (cond==4)
      {
    sleep(2);
    printf ("

Oh..NO..Your answer is wrong
Koi bat nahi. All the best 
to
next one.");
    getch();
      }

    }
    textcolor (7);
    cprintf ("");
  }
   clrscr();
   gotoxy (28,11);
   if (score>=qualify)
   {
     gotoxy (1,25);
     printf ("OmDev Softwares Pvt. Ltd.");
     textcolor (-5);
     cprintf ("CONGRATULATIONS YOU ARE QUALIFIED");
     gotoxy (28,12);
     textcolor (RED);
     cprintf ("So, when will you give the party???");
     getch();
     textcolor(7);
     cprintf ("");
     return;
   }
   else
   {
     gotoxy (1,25);
     printf ("OmDev Softwares Pvt. Ltd.");
     textcolor (2);
     cprintf ("Sorry, you are disqualified");
     gotoxy (28,12);
     cprintf ("Hey, cheer up ur mood and play again");
     gotoxy (28,13);
     cprintf ("Press any key to return to main menu...");
     getch();
     textcolor (7);
     cprintf ("");
     return;
   }
}


char id1[100];

login()
{
  char password[100],i;
  char c;
  int flag=0;
  enuid : clrscr();
  gotoxy (1,25);
  printf ("OmDev Softwares Pvt. Ltd.");
  gotoxy (28,11);
  printf ("ENTER USERID : ");
  gotoxy (28,12);
  printf ("PASSWORD     : ");
  gotoxy (44,11);
  gets(usr1);
  i=0;
  c='

Answer 1

您缺少 #include <ctype.h>对于 toupper .

其余的，我真的不知道从哪里开始......

您正在编译 C++ ，而不是 C

您的所有函数都缺少返回类型(但 void 应该适用于所有函数)