定义附加项

#include <iostream>
#include <string>

using namespace std;

int main ()
{
string k1,k2;
cout << "Enter some words:(Ctrl + I to end)" << endl;
while(cin >> k1)
{
#ifndef NDEBUG
cout << endl << "调试：" << k1 << endl;  // 这是调试用的，
#endif
if( !isapper(k1[0]))
continue;
if(k1 == k2)
break;
else
k2 = k1;
}
if(k1 == k2 && !k1.empty())
cout << "The repeated word:" << k1 << endl;
else
cout << "没有重复的！" << endl;

return 0;
}