C++：问2个小语句段的差别如题：string word;while(cin>>word)cout

C++：问2个小语句段的差别如题：string word;while(cin>>word)cout
C++：问2个小语句段的差别
如题：
string word;
while(cin>>word)
cout

C++：问2个小语句段的差别如题：string word;while(cin>>word)cout
string word;
while(cin>>word)
cout