C প্রোগ্রামিং ও File অপারেশন

Submitted by administrator on Mon, 01/02/2012 - 16:33

In Chapter 5, "Reading from and Writing to Standard I/O," you learned how to read or write characters through standard input or output. In this lesson you'll learn to read data from or write data to disk files. The following topics are discussed in this lesson:

    Files and streams
    Opening a file with fopen()
    Closing a file with fclose()
    The fgetc() and fputc() functions
    The fgets() and fputs() functions
    The fread() and fwrite() functions
    The feof() function


Summary

  •     In C, a file can refer to a disk file, a terminal, a printer, or a tape drive.
  •     The data flow you transfer from your program to a file, or vice versa, is called a stream.
  •     A stream is a series of ordered bytes.
  •     Not like a file, a stream is device-independent.
  •     There are two stream formats: text stream and binary stream.
  •     The file position indicator in the FILE structure points to the position in a file where data will be read from or written to.
  •     The fopen() function is used to open a file and associate a stream to the opened file.
  •     You can specify different modes for opening a file.
  •     The fclose() function is responsible for closing an opened file and disassociating a stream with the file.
  •     The fgetc() and fputc() functions read or write one character at a time.
  •     The fgets() and fputs() functions read or write one line at a time.
  •     The fread() and fwrite() functions read or write one block of data at a time.
  •     The feof() function can determine when the end of a file has been reached.
  •     In a binary file, the feof() function should be used to detect EOF.

 

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মডুলার C প্রোগ্রামিং (Modular C Programming)

কেবল মাত্র একটি ফাংশন দিয়ে কোনো বড়ো জটিল সমস্যা সমাধানের চেষ্টা করা ভাল প্রোগ্রামিংয়ের পদ্ধতি নয়। সঠিক পদ্ধতি হ'ল সমস্যাটিকে কয়েকটি ছোট ছোট এবং সরল টুকরো করে ফেলা যাতে তা আরও বিশদে বোঝা যায় । তারপরে এই ছোট এবং সরল সমস্যাগুলি সমাধান করার জন্য ছোট ছোট ফাংশন ব্লক তৈরি করা এবং পরে সেগুলি নিয়মানুযায়ী সংযোজিত করা ।

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