C program to copy one file to another file

‪#‎include‬<stdio.h>
#include<process.h>

void main() {
FILE *fp1, *fp2;
char a;
clrscr();

fp1 = fopen("test.txt", "r");
if (fp1 == NULL) {
puts("cannot open this file");
exit(1);
}

fp2 = fopen("test1.txt", "w");
if (fp2 == NULL) {
puts("Not able to open this file");
fclose(fp1);
exit(1);
}

do {
a = fgetc(fp1);
fputc(a, fp2);
} while (a != EOF);

fcloseall();
getch();
}