#include<iostream>
#include<string>
#include<cctype>
using namespace std;
int main()
{
    string currWord,preWord;
    cout<<"Enter somewords:(Ctral+Z to end)"<<endl;
    while(cin>>currWord)
    {
#ifndef NDEBUG
        cout<<currWord<<endl;
#endif
        if(!isupper(currWord[0]))
            continue;
        if(currWord==preWord)
            break;
        else
            preWord=currWord;
    }
    if(currWord==preWord&&!currWord.empty())
        cout<<"The is no repeated wor that has initial capital."<<endl;
    else
        cout<<"There is no repeated word that has initial capital."<<endl;

    return 0;
}

为何这段程序输入MM MM^Z时会出现跟所设计的结果不一样？
且程序第一次读入MM后不会立即读入MM^Z而是等到下次输入NN ^Z时再一起读入上次的MM^Z，
也就是说输入NN^Z加回车后程序读入的是MM^ZNN,

书本复制的，，目测是全的

第一次读入MM后不会立即读入MM^Z而是等到下次输入NN ^Z时再一起读入上次的MM^Z，
也就是说输入NN^Z加回车后程序读入的是MM^ZNN,

？？？？