C program to display its own source code as output

PROGRAM:

#include <stdio.h>

int main()

 {

    FILE *fp;

    char c;

    fp = fopen(__FILE__,"r");

    do 

      {

         c = getc(fp);

         putchar(c);

       }

    while(c != EOF);

    fclose(fp);

    return 0;

}

MASTER OTHER EXAMPLES:

Write a sentence to a file Read a line from a file and display it

C program to read a line from a file and display it

PROGRAM:

#include <stdio.h>

#include <stdlib.h> 

int main()

{

    char c[1000];

    FILE *fptr;

    if ((fptr = fopen("program.txt", "r")) == NULL)

    {

        printf("Error! opening file");

        exit(1);         

    }

    fscanf(fptr,"%[^\n]", c);

    printf("Data from the file:\n%s", c);

    fclose(fptr);

    return 0;

}

NOTICE:

The file program.txt should be created otherwise it prints an error message

MASTER OTHER EXAMPLES:

Write a sentence to a file Display its own source code as output

C program to write a sentence to a file

PROGRAM:

#include <stdio.h>

#include <stdlib.h> 

int main()

{

   char sentence[1000];

   FILE *fptr;

   fptr = fopen("program.txt", "w");

   if(fptr == NULL)

   {

      printf("Error!");

      exit(1);

   }

  

   printf("Enter a sentence:\n");

   gets(sentence);

   fprintf(fptr,"%s", sentence);

   fclose(fptr);

   return 0;

}

OUTPUT:

Enter sentence:

I am awesome and so are files.

MASTER OTHER EXAMPLES:

Read a line from a file and display it Display its own source code as output