C program to split a file to multiple files

Write a C program to split a file to multiple files.

  #include <stdio.h>
  #include <string.h>
  #define MAX 256

  int main() {
        int i = 0, line = 0;
        FILE *fp1, *fp2, *fp3;
        char file1[MAX], file2[MAX], file3[MAX], str[MAX];

        /* get the name without file format(.txt) from user */
        printf("Enter your input file name:");
        scanf("%s", file1);

        /* form the output file names */
        sprintf(file2, "%s_part_%d.txt", file1, 1);
        sprintf(file3, "%s_part_%d.txt", file1, 2);
        strcat(file1, ".txt");

        /* open the input file in read mode */
        fp1 = fopen(file1, "r");

        /* error handling */
        if (!fp1) {
                printf("Unable to open input file in read mode!!\n");
                return 0;
        }

        /* open the output file in write mode */
        fp2 = fopen(file2, "w");

        /* error handling */
        if (!fp2) {
                printf("Unable to open output file in write mode\n");
                fclose(fp1);
                return 0;
        }

        /* open the output file in write mode */

        fp3 = fopen(file3, "w");

        /* error handling */

        if (!fp3) {

                printf("Unable to open output file2 in write mode\n");

                fclose(fp1);

                fclose(fp2);

                return 0;

        }

        /* calculate the number of lines in input file */

        while (!feof(fp1)) {

                fgets(str, MAX, fp1);

                if (!feof(fp1))

                        line++;

        }

        /* moving the file pointer to the start of file */

        rewind(fp1);

        /* writing first half of data to first output file */

        while (i < line/2) {

                fgets(str, MAX, fp1);

                if (!feof(fp1)) {

                        fputs(str, fp2);

                }

                i++;

        }

        /* writing second half to second output file */

        while (!feof(fp1)) {

                fgets(str, MAX, fp1);

                if (!feof(fp1)) {

                        fputs(str, fp3);

                }

        }

        /* close all opened files */

        fclose(fp1);

        fclose(fp2);

        fclose(fp3);

        /* remove the input file */

        remove(file1);

        return 0;

  }

  Output:

  jp@jp-VirtualBox:~/$ cat data.txt
  abcdefg1234
  56789hijklm
  123456abcde
  fghijk12345

  jp@jp-VirtualBox:~/$ ls
  a.out  data.txt
  jp@jp-VirtualBox:~/$ ./a.out
  Enter your input file name:data

  jp@jp-VirtualBox:~/$ ls
  a.out  data_part_1.txt  data_part_2.txt 

  jp@jp-VirtualBox:~/$ cat data_part_1.txt 
  abcdefg1234
  56789hijklm

  jp@jp-VirtualBox:~/$ cat data_part_2.txt 
  123456abcde
  fghijk12345

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