c语言 用两个函数编写一个程序来帮助小学生学习四则运算

right_prompt()
{
	int x;
	
	x = rand()%4+1;
	switch(x) {
		case 1:
			printf("Very Good!\n");
			break;
		case 2:
			printf("Excellent!\n");
			break;
		case 3:
			printf("Nice work!\n");
			break;
		case 4:
			printf("Keep up the good work!\n");
			break
	}
}

wrong_prompt()
{
	int x;
	
	x = rand()%4+1;
	switch(x) {
		case 1:
			printf("No. Please try again.\n");
			break;
		case 2:
			printf("Wrong. Try once more.\n");
			break;
		case 3:
			printf("Don’t give up!\n");
			break;
		case 4:
			printf("Not correct. Keep trying.\n");
			break;
	}
}