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

int main()
{
    FILE *fs1, *fs2, *ft;

    char ch, file1[20], file2[20], file3[20];

    printf("Enter name of first filen");
    gets(file1);

    printf("Enter name of second filen");
    gets(file2);

    printf("Enter name of file which will store contents of the two filesn");
    gets(file3);

    fs1 = fopen(file1, "r");
    fs2 = fopen(file2, "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen(file3, "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("The two files were merged into %s file successfully.n", file3);

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}