string i/o problem [Help]

[dhj0001]

Hey can anyone help me with this simple program I wrote. I can't figure out why it keeps skipping a cin... Any help is much appreciated!

#include <iostream>
#include <string>

   using namespace std;

   int main()
   {
      cout << "Enter a sentence: ";
      string sentence1;
      getline(cin,sentence1);
      cout << sentence1 << endl;
      
      cin.clear();
      cin.sync();
   	
      cout << "Enter another sentence: ";
      string sentence2;
      getline(cin,sentence2);
      cout << sentence2 << endl;
      
      cin.clear();
      cin.sync();
      
      cout << "Again, enter a sentence: ";
      string sentence3;
      getline(cin,sentence3);
      cout << sentence3 << endl;
      
      cin.clear();
      cin.sync();
      
      cout << "Again, enter a sentence: ";
      string sentence4;
      getline(cin,sentence4);
      cout << sentence4 << endl;
      
      return 0;
   }

Enter a sentence: Hello c++ forums
Hello c++ forums
Enter another sentence: 
Again, enter a sentence: Why did it skip that line?
Why did it skip that line?
Again, enter a sentence: 

Solution code:

#include <iostream>
#include <string>

   using namespace std;

   int main()
   {

      cin.clear()
      cin.ignore(256, '\n');
      cin.sinc();
      cout << "Enter a sentence: ";
      string sentence1;
      getline(cin,sentence1);
      cout << sentence1 << endl;
      
     cin.ignore(256, '\n');
   	
      cout << "Enter another sentence: ";
      string sentence2;
      getline(cin,sentence2);
      cout << sentence2 << endl;
      
      cin.ignore(256, '\n');
      
      cout << "Again, enter a sentence: ";
      string sentence3;
      getline(cin,sentence3);
      cout << sentence3 << endl;
      
      cin.ignore(256, '\n');
      
      cout << "Again, enter a sentence: ";
      string sentence4;
      getline(cin,sentence4);
      cout << sentence4 << endl;
      
      return 0;
   }

[S6k9GNh0]

What compiler are you using?

My output was:

Enter a sentence: test
test
Enter another sentence: test
test
Again, enter a sentence: test
test
Again, enter a sentence: test
test

[dhj0001]

g++, use spaces in your sentence instead of just "test"...

[Galik]

The code works for me too:

Enter a sentence: First sentence
First sentence
Enter another sentence: Second sentence
Second sentence
Again, enter a sentence: Third sentence
Third sentence
Again, enter a sentence: Fourth sentence
Fourth sentence

[dhj0001]

so it's my compiler that's the problem? What compiler are you using?

[Galik]

dhj0001 wrote:

so it's my compiler that's the problem? What compiler are you using?

I am using GCC v4.6 on Linux. But your code looks like it should work to me regardless of compiler.

[binarybob350]

Comment out the following lines and try it

cin.clear();
cin.sync();

[hasan shehryar]

it works fine for me as well... i use microsoft visual studio 6.

[spra1323]

the code worked for me as well ..on visual studio 2008 express edition ..

[dhj0001]

Comment out the following lines and try it

cin.clear();
cin.sync();

No luck... same output happened.

I'm using jGrasp with a g++ compiler. So this is the problem?? That's stupid, I wish this kind of stuff was more standardized....

[S6k9GNh0]

It is. Try replacing cin.sync() with std::cin.ignore(std::numeric_limits<streamsize>::max(),'\n');