case 'u':
			placeholder = ungets_index;
			while (ungets_index >= 0)
				operator_or_error_overread[index_error++] = ungets_string[ungets_index--];
			ungets_index = placeholder;
			break;
		case 'r':
			printf("Cleared ungets_string[]: %s\n", ungets_string);
			cleararray(ungets_string, ungets_index);
			printf("Current ungets_string: %s", ungets_string);
			ungets_index = 0;
			break;
		case '\n':
			mrp = pop();
			printf("\t%.8f\n", mrp);
			cleararray(ungets_string, ungets_index);
			ungets_index = 0;
			printf("Current ungets_string: %s", ungets_string);
			break;

void cleararray(char array[], int endofdata)
{
	int i = 0;
	while (i <= endofdata)
	{
		array[i] = '\0';
		i++;
	}
}