ca50a_c++_break_continue_语句

/*ca50a_c++_break_continue_语句
break语句-打断for{}内部的循环。
1.打断while
2.打断do while
3.打断for
4.打断switch
continue语句-提前结束当次迭代，继续循环
goto语句-60年代开始就禁止使用了！一般不用

srand((unsigned)time(NULL));//用时间来设计随机数的种子
 #include <ctime>时间头文件
 if (islower(word[0]))//判断是否小写

 vs2017,使用ctrl+F5运行
*/

#include <iostream>
#include <vector>
#include <ctime>
#include <string>
using namespace std;

int main()
{
	vector<int> vec;
	//int r;

	srand((unsigned)time(NULL));//用时间来设计随机数的种子

	for (int i = 0; i < 10000; ++i)
	{
		//r = rand() % 101;
		//vec.push_back(r);
		//cout << r << endl;

		vec.push_back(rand() % 100);//rand()随机数
	}
	cout << "检查是否有人得100分？" << endl;

	//for (int j = 0; j < 10000; ++j)
	//{
	//	if (vec[j] == 100)
	//		break;
	//}
	vector<int>::iterator iter = vec.begin();
	while (iter != vec.end())
	{
		if (*iter == 100)
			break;//打断循环，终止循环
		else
			++iter;
	}
	if (iter != vec.end())
		cout << "有人得100分" << endl;
	else
		cout << "没有人得100分" << endl;

  //continue例子提前结束当次迭代，继续循环
	string word;
	cout << "enter some words: ctrl+z to end" << endl;
	while (cin >> word)
	{
		if (islower(word[0]))//判断是否小写
			continue;
		else
		{
			cout << "找到一个大写单词" << endl;
			cout << word;
			cout << ",其长度是：";
			cout << word.size() << endl;
		}
	}


	system("pause");
	return 0;
}