一文详解C++的程序流程控制

int main() {
	//选择结构-单行if语句
	//输入一个分数，如果分数大于600分，视为考上一本大学，并在屏幕上打印
	int score = 0;
	cout << "请输入一个分数：" << endl;
	cin >> score;
	cout << "您输入的分数为： " << score << endl;
	//if语句
	//注意事项，在if判断语句后面，不要加分号
	if (score > 600)
	{
		cout << "我考上了一本大学！！！" << endl;
	}
	return 0;
}

int main() {
	//选择结构-单行if语句
	//输入一个分数，如果分数大于600分，视为考上一本大学，并在屏幕上打印
	int score = 0;
	cout << "请输入一个分数：" << endl;
	cin >> score;
	cout << "您输入的分数为： " << score << endl;
	//if语句
	//注意事项，在if判断语句后面，不要加分号
	if (score > 600)
	{
		cout << "我考上了一本大学！！！" << endl;
	}
	return 0;
}

int main() {
	int score = 0;
	cout << "请输入考试分数：" << endl;
	cin >> score;
	if (score > 600)
	{
		cout << "我考上了一本大学" << endl;
	}
	else
	{
		cout << "我未考上一本大学" << endl;
	}
	return 0;
}

int main() {
	int a = 10;
	int b = 20;
	int c = 0;
	c = a > b ? a : b;
	cout << "c = " << c << endl;
	//c++中三目运算符返回的是变量,可以继续赋值
	(a > b ? a : b) = 100;
	cout << "a = " << a << endl;
	cout << "b = " << b << endl;
	cout << "c = " << c << endl;
	return 0;
}

switch(表达式)
{
	case 结果1：执行语句;break;
	case 结果2：执行语句;break;
	...
	default:执行语句;break;

}

int main() {
	//请给电影评分 
	//10 ~ 9   经典   
	// 8 ~ 7   非常好
	// 6 ~ 5   一般
	// 5分以下 烂片
	int score = 0;
	cout << "请给电影打分" << endl;
	cin >> score;
	switch (score)
	{
	case 10:
	case 9:
		cout << "经典" << endl;
		break;
	case 8:
		cout << "非常好" << endl;
		break;
	case 7:
	case 6:
		cout << "一般" << endl;
		break;
	default:
		cout << "烂片" << endl;
		break;
	}
	return 0;
}

int main() {
	int num = 0;
	while (num < 10)
	{
		cout << "num = " << num << endl;
		num++;
	}
	return 0;
}

int main() {
	int num = 0;
	do
	{
		cout << num << endl;
		num++;

	} while (num < 10);
	return 0;
}

int main() {
	for (int i = 0; i < 10; i++)
	{
		cout << i << endl;
	}
	return 0;
}

int main() {
	//1、在switch 语句中使用break
	cout << "请选择您挑战副本的难度：" << endl;
	cout << "1、普通" << endl;
	cout << "2、中等" << endl;
	cout << "3、困难" << endl;
	int num = 0;
	cin >> num;
	switch (num)
	{
	case 1:
		cout << "您选择的是普通难度" << endl;
		break;
	case 2:
		cout << "您选择的是中等难度" << endl;
		break;
	case 3:
		cout << "您选择的是困难难度" << endl;
		break;
	}
	return 0;
}

int main() {
	for (int i = 0; i < 100; i++)
	{
		if (i % 2 == 0)
		{
			continue;
		}
		cout << i << endl;
	}
	return 0;
}

int main() {
	cout << "1" << endl;
	goto FLAG;
	cout << "2" << endl;
	cout << "3" << endl;
	cout << "4" << endl;
	FLAG:
	cout << "5" << endl;
	return 0;
}