perform I/O in a given file using Character I/O with comments

 perform I/O in a given file using Character I/O
 /* Program to perform I/O in a given file using Character I/O */

#include<stdio.h>

main()
{
//declaring pointer to file
FILE *fp;

char chr;

printf("------------Writing in file:-----------------\n");
/* Writing in File*/

//Opening file for writing
fp=fopen("thought.txt","w");

//Checking file exists or not
if(fp==NULL)
{
printf("Error in opening file:\n");
return 0;
}

else

//If the file exists then writing into it character by character
{

printf("Enter text to be written in file:\n");
while((chr=getchar())!= EOF)
fputc(chr,fp);
}

//Closing the file
fclose(fp);


/* Reading in File*/
//Opening file for reading
printf("\n\n------------Reading from file:-----------------\n");
fp=fopen("thought.txt","r");

if(fp==NULL)
{
printf("Error in opening file:\n");
return 0;
}

//If the file exists then reading through it character by character
else
{

printf("Text found in the file is:\n");
while((chr=fgetc(fp))!= EOF)
printf("%c",chr);
}

//closing the file
fclose(fp);
}

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