C programming power point presentation c ppt.pptx
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The document discusses random access files in C programming. It defines random access files as files that allow non-sequential reading and writing of data without reading all preceding data. It describes functions like fseek(), ftell(), and rewind() that enable random access. It provides examples of using ftell() to get a file size and fseek() to modify part of a file's contents. It discusses the syntax for creating random access files and advantages like faster access to specific data points compared to sequential access files.
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- 1. K.S.R College of Engineering Department of Computer Science and Engineering c program Topic : Random Access File
- 2. Definition Random access file in C enables us to read or write any data in our disk file without reading or writing every piece of data before it. In a random-access file, we may quickly search for data, edit it or even remove it.
- 3. Function in random access file There are three functions which help in using the Random-Access file in C: fseek() ftell() rewind()
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- 5. Example program for fseek() #include<stdio.h> Void main () { FILE *fp ; fp=fopen (“myfile.txt”, “w+”); fputs (“This is my subject”, fp); fseek (fp,7,SEEK_SET); fputs (“Programming in C”, fp); fclose (fp); } OUTPUT : Programming in C
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- 7. Need for random access file Random access files permit nonsequential, or random, access to a file's contents. To access a file randomly, you open the file, seek a particular location, and read from or write to that file. This functionality is possible with the SeekableByteChannel interface.
- 8. Advantages Random access files provide greater flexibility and faster access to specific data points within the file. They allow for the efficient processing of data that is not ordered or arranged in a specific sequence. Random access files provide greater flexibility and faster access to specific data points within the file.