Cin string

Kay Chan · #1 05-Sep-2004, 03:34

I want to input sth and store it by string. However, when I input the words that contains space, the variable only store the characters after the space
eg...Good Boy <--only store the Boy in the variable

string word;
cin >> word;

How to solve this problem? Also, I want to hold the screen in sub menu? When user click enter, the sub menu go back to main menu

LuciWiz · #2 05-Sep-2004, 07:34

Quote:

Originally Posted by Kay Chan

I want to input sth and store it by string. However, when I input the words that contains space, the variable only store the characters after the space
eg...Good Boy <--only store the Boy in the variable

string word;
cin >> word;

Use cin.getline(word) for char *, or getline(cin, word) for string

CPP / C++ / C Code:

string word;
cout << "\nEnter word \n";
getline(cin, word);
cout <<  word.c_str();

Don't forget using namespace std;

Regards,
Luci

wc3promet · #3 13-Oct-2004, 07:53

Quote:

Originally Posted by LuciWiz

Use cin.getline(word) for char *, or getline(cin, word) for string

CPP / C++ / C Code:

string word;
cout << "\nEnter word \n";
getline(cin, word);
cout <<  word.c_str();

Don't forget using namespace std;

Regards,
Luci

It still only reads Boy.

LuciWiz · #4 13-Oct-2004, 09:09

Quote:

Originally Posted by wc3promet

Luci's code doesn't work.

Really

What compiler did you use? It works fine under Visual C++ 6.0. Maybe it's not correct for other compilers?
There is a certain problem with *older* VC compilers (including 6), but this does not affect the reading of your line.
There is also a problem with using getline after getline. Maybe you did this? Because there is a newline pushed in by the environment - nobody knows why

. You can solve this by using a "dummy" variable to "catch" the newline:

CPP / C++ / C Code:

	string word1, word2, dummy;

	cout << "Enter first word " << endl;
	getline(cin, word1);
	cout <<  word1.c_str() << endl;

	cout << "Enter second word" << endl;

//	Get rid of the newline inserted by the environment
	getline(cin, dummy);
	
	getline(cin, word2);
	cout << word2.c_str() << endl;

Or, you could use ignore to get rid of this annoying "feature":

CPP / C++ / C Code:

	string word1, word2, dummy;

	cout << "Enter first word " << endl;
//	cin >> word1;
	getline(cin, word1);
	cout <<  word1.c_str() << endl;


	cout << "Enter second word" << endl;
	
//	Get rid of the newline inserted by the environment
	cin.ignore(1,'n');
	
	getline(cin, word2);
	cout << word2.c_str() << endl;

Hope this solves your problem. If not, please let me know!

Kind regards,
Luci

wc3promet · #5 13-Oct-2004, 10:16

Quote:

Originally Posted by LuciWiz

Really

What compiler did you use? It works fine under Visual C++ 6.0. Maybe it's not correct for other compilers?
There is a certain http://support.microsoft.com/default.aspx?scid=KB;en-us;q240015 with *older* VC compilers (including 6), but this does not affect the reading of your line.
There is also a problem with using getline after getline. Maybe you did this? Because there is a newline pushed in by the environment - nobody knows why

. You can solve this by using a "dummy" variable to "catch" the newline:

CPP / C++ / C Code:

	string word1, word2, dummy;

	cout << "Enter first word " << endl;
	getline(cin, word1);
	cout <<  word1.c_str() << endl;

	cout << "Enter second word" << endl;

//	Get rid of the newline inserted by the environment
	getline(cin, dummy);
	
	getline(cin, word2);
	cout << word2.c_str() << endl;

Or, you could use ignore to get rid of this annoying "feature":

CPP / C++ / C Code:

	string word1, word2, dummy;

	cout << "Enter first word " << endl;
//	cin >> word1;
	getline(cin, word1);
	cout <<  word1.c_str() << endl;


	cout << "Enter second word" << endl;
	
//	Get rid of the newline inserted by the environment
	cin.ignore(1,'n');
	
	getline(cin, word2);
	cout << word2.c_str() << endl;

Hope this solves your problem. If not, please let me know!

Kind regards,
Luci

I'm using Dev C++ 4.9.9.0.
I was trying to find one easy way to read in the User's Input: "First Middle Last" or "First Last" as 1 complete String instead of splitting them into 3 Strings, then joining them back.

LuciWiz · #6 14-Oct-2004, 02:00

I'm sorry, I don't have this compiler, nor can I install it on this machine.... Hope someone who works with it will help you out. My solutions work correct under Visual C. I don't know what the problem is with your compiler.

Regards,
Luci

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