Reading and writing one character at a time

/* 2102.c: Reading and writing one character at a time */
#include <stdio.h>

enum {SUCCESS, FAIL};

void CharReadWrite(FILE *fin, FILE *fout);

main(void)
{
    FILE *fptr1, *fptr2;
    char filename1[]= "test1.txt";
    char filename2[]= "test2.txt";
    int reval = SUCCESS;

    if ((fptr1 = fopen(filename1, "w")) == NULL){
        printf("Cannot open %s.\n", filename1);
        reval = FAIL;
    }
    else if ((fptr2 = fopen(filename2, "r")) == NULL){
        printf("Cannot open %s.\n", filename2);
        reval = FAIL;
    }
    else {
        CharReadWrite(fptr2, fptr1);
        fclose(fptr1);
        fclose(fptr2);
    }

    return reval;
}
/* function definition */
void CharReadWrite(FILE *fin, FILE *fout)
{
    int c;

    while ((c=fgetc(fin)) != EOF){
        fputc(c, fout); /* write to a file */
        putchar(c); /* put the character on the screen */
    }
}