C Program to Append the Content of One File to the End of Another File

This C Program appends the content of file at the end of another.

Here is source code of the C Program to append the content of file at the end of another. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

  1. /*
  2.  * C Program to Append the Content of File at the end of Another
  3.  */
  4. #include <stdio.h>
  5. #include <stdlib.h>
  7. main()
  8. {
  9.     FILE *fsring1, *fsring2, *ftemp;
  10.     char ch, file1[20], file2[20], file3[20];
  12.     printf("Enter name of first file ");
  13.     gets(file1);
  14.     printf("Enter name of second file ");
  15.     gets(file2);
  16.     printf("Enter name to store merged file ");
  17.     gets(file3);
  18.     fsring1 = fopen(file1, "r");
  19.     fsring2 = fopen(file2, "r");
  20.     if (fsring1 == NULL || fsring2 == NULL)
  21.     {
  22.         perror("Error has occured");
  23.         printf("Press any key to exit...\n");
  24.         exit(EXIT_FAILURE);
  25.     }
  26.     ftemp = fopen(file3, "w");
  27.     if (ftemp == NULL)
  28.     {
  29.         perror("Error has occures");
  30.         printf("Press any key to exit...\n");
  31.         exit(EXIT_FAILURE);
  32.     }
  33.     while ((ch = fgetc(fsring1)) != EOF)
  34.         fputc(ch, ftemp);
  35.     while ((ch = fgetc(fsring2) ) != EOF)
  36.         fputc(ch, ftemp);
  37.     printf("Two files merged  %s successfully.\n", file3);
  38.     fclose(fsring1);
  39.     fclose(fsring2);
  40.     fclose(ftemp);
  41.     return 0;
  42. }

$ cc pgm47.c
$ a.out
Enter name of first file a.txt
Enter name of second file b.txt
Enter name to store merged file merge.txt
Two files merged merge.txt successfully.

Sanfoundry Global Education & Learning Series – 1000 C Programs.


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If you wish to look at other example programs on File Handling, go to File Handling. If you wish to look at programming examples on all topics, go to C Programming Examples.

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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