Help with calculating avrg from input file.

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Re: Help with calculating avrg from input file.

 
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  #11
Mar 27th, 2007
How about:
c Syntax (Toggle Plain Text) 
  1. int total=0;
  2.  
  3. while (inFile) {
  4.     total += ctemp;
  5.     // ....
  6. }
Last edited by John A; Mar 27th, 2007 at 7:12 pm. Reason: whoops, forgot to initalize total!
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Re: Help with calculating avrg from input file.

 
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  #12
Mar 27th, 2007
ok. almost there, what about the line counter waltp suggested so that i could calculate the average?? how do i incorporate that
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Re: Help with calculating avrg from input file.

 
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  #13
Mar 27th, 2007
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Originally Posted by swordy06 View Post
ok. almost there, what about the line counter waltp suggested so that i could calculate the average?? how do i incorporate that
Here's a start:
C++ Syntax (Toggle Plain Text) 
  1. int counter=0; // increment this inside the loop, add +1 after the loop
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Re: Help with calculating avrg from input file.

 
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  #14
Mar 27th, 2007
C++ Syntax (Toggle Plain Text) 
  1.         int total=0;
  2.         int count=0;
  3.         while (inFile) //End-ofFile Controlled Loop
  4.         {
  5.                total += ctemp;
  6.               (total=1; total<25; total++)
  7.               outFile << "\t" << ref << "\t" << mydate << "\t" << Celsius(ctemp)
  8.               << "°F" << endl << endl; // Write Record
  9.               inFile >> ref >> mydate >> ctemp; // Read File
  10.               (count=1; count<25; )
  11.         }
  12.              count++;
  13.              average= total/count;

it should be something like that, i imagine, i must be bugging the hell outta u joeprogrammer, for that im sorry:rolleyes:. Its simply because up till now i havent done any programs that require counters of any sort, just very basic stuff, and the logic escapes me but thanks for your patience.
Last edited by swordy06; Mar 27th, 2007 at 9:22 pm.
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Re: Help with calculating avrg from input file.

 
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  #15
Mar 27th, 2007
Put the incrementation inside the loop. And what are these lines supposed to do?
C++ Syntax (Toggle Plain Text) 
  1. (total=1; total<25; total++)
  2. (count=1; count<25; )

Here's how it should look:
C++ Syntax (Toggle Plain Text) 
  1. int total=0;
  2. int count=0;
  3. while (inFile) //End-ofFile Controlled Loop
  4. {
  5.     total += ctemp;
  6.     ++count;
  7.     outFile << "\t" << ref << "\t" << mydate << "\t" << Celsius(ctemp)
  8.             << "°F" << endl << endl; // Write Record
  9.     inFile >> ref >> mydate >> ctemp; // Read File
  10. }
  11. ++count;
  12. average= total/count;

And you don't need to worry about bugging me, we were all newbies once.
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Re: Help with calculating avrg from input file.

 
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  #16
Mar 27th, 2007
  1. (total=1; total<25; total++)
  2. (count=1; count<25; )
I thought i had to define the number of lines within the input file, and i used that from another example code that i saw,
thats probably not the right way to do it. In other words i thought that was the incrementation or that thats how you do it
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Re: Help with calculating avrg from input file.

 
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  #17
Mar 27th, 2007
nevermind those 2 lines, it didnt make sense to include them, ok, i have a problem, the counter runs fine, but it is taking the temperatures from the input file, i need it to count the temperatures from the output file since those are the temperatures already converted how can i make the counter so that it counts the already converted temperatures??

I imagine it might be done with another decision?

while (inFile)

{ total += ctemp // .....
Last edited by swordy06; Mar 27th, 2007 at 11:00 pm.
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Re: Help with calculating avrg from input file.

 
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  #18
Mar 27th, 2007
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Originally Posted by swordy06 View Post
  1. (total=1; total<25; total++)
  2. (count=1; count<25; count++)
I thought i had to define the number of lines within the input file, and i used that from another example code that i saw,
thats probably not the right way to do it.
You were taking a section from a for() loop. A typical for() loop looks like this:
C++ Syntax (Toggle Plain Text) 
  1. for (int i=0; i < x; ++i) {
  2.  
  3.    // blah blah
  4. }

The part that actually does the incrementation is the last statement, ++i. All the rest is just loop-related stuff.
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Re: Help with calculating avrg from input file.

 
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  #19
Mar 27th, 2007
i have a problem, the counter runs fine, but it is taking the temperatures from the input file, i need it to count the temperatures from the output file since those are the temperatures already converted how can i make the counter so that it counts the already converted temperatures??

I imagine it might be done with another decision?

while (inFile)

{ total += ctemp // .....
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Re: Help with calculating avrg from input file.

 
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  #20
Mar 28th, 2007
Convert the amount to celsius before you add it onto the total. (not tested)
C++ Syntax (Toggle Plain Text) 
  1. int total=0;
  2. int count=0;
  3. int celsiusTemp;
  4. while (inFile) //End-ofFile Controlled Loop
  5. {
  6.     celsiusTemp = Celsius(ctemp); // convert it to celsius beforehand
  7.     total += celsiusTemp;
  8.     ++count;
  9.  
  10.     // don't have to call 'Celsius' here, use the variable 'celsiusTemp'
  11.     outFile << "\t" << ref << "\t" << mydate << "\t" << celsiusTemp
  12.             << "°F" << endl << endl; // Write Record
  13.     inFile >> ref >> mydate >> ctemp; // Read File
  14. }
  15. ++count;
  16. average= total/count;
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