C++ primer(第五版） 练习 5.21个人code

#include <iostream>
#include <string>

using std::cout;
using std::cin;
using std::endl;
using std::string;

int main()
{
string str,tmpstr;
unsigned cnt = 0;
cin >> str;
tmpstr = str;
while (cin >> str)
{
if (str == tmpstr&&str[0]>='A'&&str[0]<='Z')
{
++cnt;
cout << str << "是连续重复再现的" << endl;
break;
}
tmpstr = str;
}
if (cnt==0)
cout << "没有任何以大写字母开头单词是连续重复出现" << endl;

return 0;

}