DaniWeb Forum Index > Software Development > C

C RSS

Big looping problem in C - help

Thread Solved

•

Join Date: Oct 2008

Posts: 48

Reputation: atman is an unknown quantity at this point

Solved Threads: 0

atman

Offline

Light Poster

Big looping problem in C - help

Nov 3rd, 2008

Hey Guys!
I have a weired one here, it must be a post-test loop, and here is how result has to look like:

Enter the Section Code: 0 
Invalid value entered. Must be 1 to 4, please re-enter: 1 
Enter the Student's ID: 456789 
Enter mark#1: 10 
Enter mark#2: -20 
Invalid grade entered. Must be 0.0 to 100.0, please re-enter: 20 
Enter mark#3: 5.5
 Enter mark#4: 5 
Enter mark#5: 10
 Enter mark#6: 6 
Enter mark#7: 7
 000456789's total mark is: 63.5
  Enter the Student's ID ['0' to quit]: 123654987
 Enter mark#1: 1 
Enter mark#2: 2 
Enter mark#3: 3
 Enter mark#4: 4
 Enter mark#5: 5 
Enter mark#6: 6 
Enter mark#7: 7
123654987's total mark is: 28.0
  Enter the Student's ID ['0' to quit]: 0 
The average for the section is 45.75%
  Enter the Section Code [0 to quit]: 5 
Invalid value entered. Must be 0 to 4, please re-enter: 2
 Enter the Student's ID: 987654 
Enter mark#1: 7
 Enter mark#2: 6 
Enter mark#3: 5 
Enter mark#4: 4
 Enter mark#5: 3
 Enter mark#6: 2
 Enter mark#7: 1
 000987654's total mark is: 28.0
  Enter the Student's ID ['0' to quit]: 0 
The average for the section is 28.00%
  Enter the Section Code [0 to quit]: 0  
The average for the course is 39.83%

i got everything working except looping the main sequence, take a look at my results:

Enter the Section Code:44

Invalid value entered. Must be 1 to 4, please re-enter:1

Enter Student's ID:11

Enter Mark#1:5
Enter Mark#2:5
Enter Mark#3:5
Enter Mark#4:5
Enter Mark#5:5
Enter Mark#6:5
Enter Mark#7:5
000000011's total mark is: 5.0

Enter Student's ID[0 to Quit]:0

Enter the Section Code[0 to quit]:3

Enter Mark#1:

everything works fine if i hit 0 at "Enter the Section Code[0 to quit]:"
but just like the log shows, when i hit anything but 0 it goes to "Enter Mark1:" instead of "Enter Students ID:", i just cant loop it properly.,
here comes my code a part of my main():

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
     section=PreSecCode();
       student_id=PreStudentId();
 
do
{
       do
   {
 
       mark=Mark();
       PrintIt(student_id, mark);
 
   student_id=StudentId();
   }while(student_id!=0);
 
       section=SecCode();
 
}while(section!=0);
     section=PreSecCode();
       student_id=PreStudentId();

do
{
       do
   {

       mark=Mark();
       PrintIt(student_id, mark);

   student_id=StudentId();
   }while(student_id!=0);

       section=SecCode();

}while(section!=0);

any help would be greatly appreciated!!
chheers

•

Join Date: Aug 2005

Posts: 5,264

Reputation: iamthwee is a splendid one to behold

Solved Threads: 377

iamthwee

Offline

Posting Expert

Re: Big looping problem in C - help

Nov 4th, 2008

Is your program accepting integers as well as strings(letters)?

*Voted best profile in the world*

•

Join Date: Oct 2008

Posts: 48

Reputation: atman is an unknown quantity at this point

Solved Threads: 0

atman

Offline

Light Poster

Re: Big looping problem in C - help

Nov 4th, 2008

•

Originally Posted by iamthwee

Is your program accepting integers as well as strings(letters)?

integers only

•

Join Date: Sep 2008

Posts: 1,563

Reputation: BestJewSinceJC is a name known to all

Solved Threads: 196

BestJewSinceJC BestJewSinceJC is offline

Offline

Posting Virtuoso

Re: Big looping problem in C - help

Nov 4th, 2008

Identify the portion of the code that isn't working and explain what it is supposed to do and I will gladly try to help you. Also, if we're supposed to identify your problem based on that 100 lines of input & output and that small segment of code, how are we going to do so if you didn't post the code for your functions that were called in that segment of code?

•

Join Date: Nov 2008

Posts: 19

Reputation: bionicseraph is an unknown quantity at this point

Solved Threads: 6

bionicseraph bionicseraph is offline

Offline

Newbie Poster

Re: Big looping problem in C - help

Nov 4th, 2008

The problem is that your outer loop is checking for 0 to exit. So when you have an error condition you are exiting the loop. Is there a char you enter to exit the program? That's the value that you'll want to use in that loop. I think you'll want to do something like this...

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
while(c != SENTINAL){
   if(c == 0){
      PrintIt("error must be 1-4");
      continue;
   }
 //other loop code
}
while(c != SENTINAL){
   if(c == 0){
      PrintIt("error must be 1-4");
      continue;
   }
 //other loop code
}

SENTINAL is the value the user enters to exit your program