Problem of declaration.

[Leojeen]

Hi!!
I've trying to implement this function:

void display(account *x,FILE *ptr){
                            account temp;
                            strcpy(temp.user_name , "doesn't exist.");
                            strcpy(temp.password , "Doesn't exist.");
                            temp.privilige = 4;
                            int i = 0;
                            while(!feof(ptr)){
                                              fread(&temp,sizeof(account),1,ptr);
                                              if(!strcmp(temp.user_name , x.user_name)){
                                                                                        temp = *x;
                                                                                        exit(1);
                                                                                        }
                                              }
                                              printf("\tThe name is: %s\n",temp.user_name);
                                              printf("\tThe password is: %s\n",temp.password);
                                              switch(temp.privilige){
                                                                     case 1 :
                                                                          printf("\tThe privilige is admin.\n");
                                                                          break;
                                                                     case 2:
                                                                          printf("\tThe privilige is: general\n");
                                                                          break;
                                                                     case 3:
                                                                          printf("\tThe privilige is mail-only.\n");
                                                                          break;
                                                                     default :
                                                                             printf("Doesn't exist.\n");
                                                                     }
                                                                     exit(1);
                                              
                                              
                          }
     }

Why the compilter says "user_name" undeclared in the first strcmp call??
I didn't finish debugging it so..it is full of problems I guess!

[tabstop]

The easy guess is that the struct account doesn't contain a field called user_name.

[Leojeen]

Well, it does!

typedef struct{
               char user_name[MAX2],password[MAX2];
               int privilige;
        }account;

or Am I missing something?

[tabstop]

If that typedef is visible to the compiler (in a header file?), then you didn't get the error user_name undeclared. If you did get that error, then the typedef isn't visible.

[Leojeen]

It was declared as a global variable, I guess that is equivalent to being in a header file. the problem still persists.

[tabstop]

Alright I misread strcpy for strcmp. I was going to spring this on you later when you got there, but we're here now: the thing on the left side of . must be an actual thing. If it is a pointer, well, that doesn't work. Fortunately, the C gods have given us -> which does the same thing, but the left side is a pointer. So you can't ever do x., you must do x-> .

[Leojeen]

JUst to make things clearer for you, you can easily notice that an "}" is added. when I remove it, a lot of similar problems with other variables of type x.user_name arise in the same manner.
Don't what is going on really!!

[Leojeen]

Ok that worked for that one.
but for this is didn't:
That is a simple sorting.

void sort(account x[],int n){
                       int result;
                       int min;
                       for (int i = 0 ; i < n  - 1 ; i++){
                             min = i;
                             for (int j = i + 1 ; j < n; j++){
                                      if ((result = strcmp(x[i].use_name,x[j].user_name)) > 0)  (here I'm having problems)
                                                  min = j;
                                      }
                             account temp;
                             temp = x[i];
                             x[i] = x[min];
                             x[min] = temp;
                             }
     }

[tabstop]

Ok that worked for that one.
but for this is didn't:
That is a simple sorting.

void sort(account x[],int n){
                       int result;
                       int min;
                       for (int i = 0 ; i < n  - 1 ; i++){
                             min = i;
                             for (int j = i + 1 ; j < n; j++){
                                      if ((result = strcmp(x[i].use_name,x[j].user_name)) > 0)  (here I'm having problems)
                                                  min = j;
                                      }
                             account temp;
                             temp = x[i];
                             x[i] = x[min];
                             x[min] = temp;
                             }
     }

You should use intellisense or something to keep you from typing "use_name" instead of "user_name".

[Leojeen]

Ya ya sorry,
It is 5am here, I'm awfully tired that's why!
last thing! what does this mean:
[Warning] unreachable code at beginning of switch statement .
Thank you

[tabstop]

Ya ya sorry,
It is 5am here, I'm awfully tired that's why!
last thing! what does this mean:
[Warning] unreachable code at beginning of switch statement .
Thank you

Anything between the switch and the first case label is guaranteed to never happen.