A lil bit of help :)

Hi guys I really need some help with one C program. I don't really know where to start from so I'll be happy to all of your advices I'm a beginner at C and I know all the stuff but my teacher decided to give us one task which is "pretty easy" according to him but all we've studied so far is if-else and those kind of stuff. So this is it:


In the text file C:\data\myfile.txt there are some integer numbers separated with one or more spaces. Write:
1) function: for copying the file int myCpy( FILE *); in a file with name given from the user (which is opened in the function) , and replacing all the spaces with tabs.
2) function void midl( FILE *); for displaying the average of the numbers higher than 10 and lesser than 20.
3) function main() , which opens the file, calls the two funtions and closes the file.


Thanks to all the repies in advance )

 

With homework, you'd be better off posting what you've tried. I'll try a give a few ideas based on what you've posted though.

replace spaces with tabs

Code:

   while(string index position is valid) {
      if(current character at index position is a space, make it a tab)
      increment position
   }

find average of values > 10 and < 20

Code:

   keep a count of integers found to be > 10 and < 20
   sum the integers in the above range
 
   while(file being read is valid) {
      if(variable stored > 10 && variable stored < 20) {
         increment counted integers
         sum += variable stored
      }
   }

   output sum / count

open user defined file

Code:

   create a char array to hold file name
   ask user for name
   try to open file by that name
   
   if(file name is good) {
      function 1
      function 2
      close file handle
   } else {
      show error message
   }

Give it whirl.

HTH

 

Thank you very much I'll try to make the whole program but if I have any problems I'll get back to you This is very helpful thanks