How to cin whole sentence with whitespaces [closed]

问题

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.

Closed 6 years ago.

I have tried:

    char tab[200];
    cin>>tab;
    cout<<tab<<endl;

and I would like to make that even if I input in console A B C all the 3 chars and spaces go into tab at once .

回答1:

Use cin.getline() instead:

char tab[200];
cin.getline(input,200);
cout<<tab<<endl;

回答2:

You could use std::getline(cin, tab).

回答3:

You probably want to use std::getline, specifying whatever character you want to mark the end of the sentence (e.g., '.').

回答4:

What you want is to do a getline in some form.

string str;
cin.get(str, 25);
cout <<"\"" <<str <<"\"" <<endl;

or

string str;
cin.getline(str, 25);
cout <<"\"" <<str <<"\"" <<endl;

Both accept a third parameter, a char, that specifies what to consider the end of the line. For details see http://www.minich.com/education/wyo/cplusplus/cplusplusch10/getfunction.htm

来源：https://stackoverflow.com/questions/15446951/how-to-cin-whole-sentence-with-whitespaces