problem with input of strings

[shreyanshcpp]

my cin.getline doesnt let me enter the variable it takes them as null and procedess to cout and finally getch(); what should i do to correct it.
i use code blocks gcc compiler

  char comp[50];
  cin.getline(comp,50);
  cout<<endl<<comp;
  getch();

i have also tried the strings library ( used string data type ) and also tried some work arounds still it didnt work.

char comp[50]<<endl;
cin>>comp;//this piece of code takes in the string but terminates
          //at white spaces         
cout<<endl<<comp;

same over here...

string comp<<endl;
cin>>comp;//this piece of code takes in the string but terminates
          //at white spaces         
cout<<endl<<comp;

[MiiNiPaa]

Is there by any means some other statement like std::cin >> /*...*/ before?
If so: http://stackoverflow.com/a/21567292