creating a filter program for chaining

This is a discussion on creating a filter program for chaining within the C Programming forums, part of the General Programming Boards category; Hello hello This is my first visit to this site but it's amazing.....I've searched the FAQ and scanned quickly through ...

  1. #1
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    creating a filter program for chaining

    Hello hello
    This is my first visit to this site but it's amazing.....I've searched the FAQ and scanned quickly through all the current threads but I couldn't find this topic anywhere. I want to write a series of programs that work as simple filters. IE. Enter a string and output only the number of characters in the string. I would like to be able to feed the data fromt the keyboard or route the input from a file. Is there anything special in the way the input has to be read or written. Can it simply be a scanf(), fscanf() [printf() or fprintf() for output] statements and chained from the command line....sorry to be rattling on...


  2. #2
    kpw
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    > IE. Enter a string and output only the number of
    > characters in the string. I would like to be able to
    > feed the data fromt the keyboard or route the input
    > from a file.

    With input from a keyboard, you can simply use a counter variable and a getchar():

    counter=0;
    while ( (c=getchar()) != EOF )
    counter++;

    With input from a file, this can be done just as easily with a counter variable and a getc() function:

    counter=0;
    while ( (c=getc(fp)) != EOF )
    counter++;

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