Answers for "cin.getline vs getline"

cin.getline

cin>>n;
cin.ignore();
cin.getline(cin,string,'n');

cin.getline

string z,s;
 while (true)
    {
      cin>>z;
      s+=z;
      if(cin.peek()=='n')
      break;
    }
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			OR/
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string s;
getline(cin,s);

getline vs cin.getline

getline(cin, variable_name, 'n');