Thread: strcmp

strcmp returns a 0 if the two strings are equal.

To print "No record..." the strcmp must not return 0. Therefore, the strings "search" and "rlist.surname" must be different

On second look at your code, I'd just leave it as "else" instead of "else if..."

The reason for that is if the strings "search" and "rlist.surname" are equal, the "if" statement's original condition is true and the "else if" is never called.

i.e.

Code:

if (strcmp (search, rlist.surname) == 0)
{                         
    printf("\n\n\t\t*** Customer Information Summary ***");
    printf("\n\n\n\t\tName           : %s, %s",rlist.surname,rlist.fname); 
    printf("\n\t\tAddress        : %s",rlist.address); 
    printf("\n\t\tContact number : %s",rlist.telnum); 
    printf("\n\n\t\tVehicle Rented : %s",rlist.cartype);
    printf("\n\t\tRent mode      : %s",rlist.mode);
    printf("\n\n\t\tRent duration  : %s ***",rlist.duration);
    printf("\n\n\t\tTotal Amount   : Php %s",rlist.amount);
    printf("\n\t\t*** Cash       : Php %s",rlist.rCash);
    printf("\n\t\t*** Change     : Php %s ***",rlist.rChange);  
}
else
{
    printf("\n *** This one record did not match... ");
}

if you mean that you don't want to display "no records" on each iteration of the file read where strcmp isn't equal, then you could use a variable to flag whether or not a record has been found.

Code:

short found = 0;

while(found == 0 && fread(...) == 1)
{
   if(strcmp(...))
   {
       ... /print your record
       found = 1;
   }
}

if(found == 0)
   printf("no records found");

maybe something like that.

Originally Posted by ronin

Code:

short found = 0;

while(found == 0 && fread(...) == 1)
{
   if(strcmp(...))
   {
       ... /print your record
       found = 1;
   }
}

if(found == 0)
   printf("no records found");

What if there are multiple records matching the search query? How about this

Code:

bool found=false;
while (fread(...) == 1) {
   if (strcmp(...) == 0) {
      // ...
      found = true;
   }
}
if (!feof(fp)) {
   fprintf(stderr, "Error in reading file!\n");
   exit(EXIT_FAILURE);
}
if (!found) {
   printf("No records found!\n");
}

Once you open a file with a file pointer called fp for example, then a straightforward way to make text files is to just do it like you normally would with printf but use

Code:

fprintf(fp, ...);

fp is what you called your file pointer and the ... is what you normally use with normal printf.

Originally Posted by pipskie

...would it possible to create a different billStatement.txt to different client? like billStatement2.txt or billStatement3.txt and so on...
I only did "a+" so it will create another entry at EOF on same file billStatement.txt

Yes. Just do this:

Code:

fp=fopen("billStatement.txt",mode);
fprintf(fp, ...);
fprintf(fp, ...);
// ...
fclose(fp);

fp=fopen("billStatement1.txt",mode);
fprintf(fp, ...);
fprintf(fp, ...);
// ...
fclose(fp);

// ...

mode is the modestring like "w" or "a+". For example opening with "w" will truncate the file, thus deleting what was previously inside it. This is normally what programs do when they write a file.