#include <stdio.h>

str_cpy(char *dest, char *src)
{
	while( *src != '\0')
		*dest++ = *src++;
	*dest = '\0';
}

main()
{
	char src[] = "hello";
	char dest[20];

	str_cpy(dest, src);
	printf("src = %s, dest = %s\n", src, dest);

	exit(0);
}