Explain putc() and getc() functions of files in C language

File is collection of records or is a place on hard disk, where data is stored permanently.

Operations on files

The operations on files in C programming language are as follows −

Naming the file
Opening the file
Reading from the file
Writing into the file
Closing the file

syntax

The syntax for opening a file is as follows −

FILE *File pointer;

For example, FILE * fptr;

The syntax for naming a file is as follows −

File pointer = fopen ("File name", "mode");

For example,

fptr = fopen ("sample.txt", "r");
FILE *fp;
fp = fopen ("sample.txt", "w");

putc( ) and getc( ) functions

putc( ) function is used for writing a character into a file.

The syntax for putc() function is as follows −

putc (char ch, FILE *fp);

For example,

FILE *fp;
char ch;
putc(ch, fp);

getc( ) function is used to read a character from file.

The syntax for getc() function is as follows −

char getc (FILE *fp);

For example,

FILE *fp;
char ch;
ch = getc(fp);

Example

Following is the C program for using putc() and getc() functions −

Live Demo

#include<stdio.h>
int main(){
   char ch;
   FILE *fp;
   fp=fopen("std1.txt","w"); //opening file in write mode
   printf("enter the text.press cntrl Z:\n");
   while((ch = getchar())!=EOF){
      putc(ch,fp); // writing each character into the file
   }
   fclose(fp);
   fp=fopen("std1.txt","r");
   printf("text on the file:\n");
   while ((ch=getc(fp))!=EOF){ // reading each character from file
      putchar(ch); // displaying each character on to the screen
   }
   fclose(fp);
   return 0;
}

Output

When the above program is executed, it produces the following result −

enter the text.press cntrl Z:
Hi Welcome to TutorialsPoint
Here I am Presenting Question and answers in C Programming Language
^Z
text on the file:
Hi Welcome to TutorialsPoint
Here I am Presenting Question and answers in C Programming Language

Bhanu Priya

Published on 24-Mar-2021 13:25:53

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