Develop a C Program to merge the content of file and display the merged content on screen

Code

#include <stdio.h>
#include <stdlib.h>

int main()
{
    // Open two files to be merged
    FILE *fp1 = fopen("file1.txt", "r");
    FILE *fp2 = fopen("file2.txt", "r");

    // Open file to store the result
    FILE *fp3 = fopen("file3.txt", "w");
    char c, ch;

    if (fp1 == NULL || fp2 == NULL || fp3 == NULL)
    {
        puts("Could not open files");
        exit(0);
    }

    // Copy contents of first file to file3.txt
    while ((c = fgetc(fp1)) != EOF)
        fputc(c, fp3);

    // Copy contents of second file to file3.txt
    while ((c = fgetc(fp2)) != EOF)
        fputc(c, fp3);

    printf("Merged file1.txt and file2.txt into file3.txt and content is\n\n");

    fclose(fp1);
    fclose(fp2);
    fclose(fp3);
    fp3 = fopen("file3.txt", "r");
    if (fp3 == NULL)
    {
        perror("Error while opening the file.\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fp3)) != EOF)
        printf("%c", ch);

    printf("\n\n");
    fclose(fp3);

    return 0;
}

Output


Yo