ca50a_c++_break_continue_語句

/*ca50a_c++_break_continue_語句
break語句-打斷for{}内部的循環。
1.打斷while
2.打斷do while
3.打斷for
4.打斷switch
continue語句-提前結束當次疊代，繼續循環
goto語句-60年代開始就禁止使用了！一般不用

srand((unsigned)time(NULL));//用時間來設計随機數的種子
 #include <ctime>時間頭檔案
 if (islower(word[0]))//判斷是否小寫

 vs2017,使用ctrl+F5運作
*/

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

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

	srand((unsigned)time(NULL));//用時間來設計随機數的種子

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

		vec.push_back(rand() % 100);//rand()随機數
	}
	cout << "檢查是否有人得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;//打斷循環，終止循環
		else
			++iter;
	}
	if (iter != vec.end())
		cout << "有人得100分" << endl;
	else
		cout << "沒有人得100分" << endl;

  //continue例子提前結束當次疊代，繼續循環
	string word;
	cout << "enter some words: ctrl+z to end" << endl;
	while (cin >> word)
	{
		if (islower(word[0]))//判斷是否小寫
			continue;
		else
		{
			cout << "找到一個大寫單詞" << endl;
			cout << word;
			cout << ",其長度是：";
			cout << word.size() << endl;
		}
	}


	system("pause");
	return 0;
}