Thread: vectors and cin, getline?

hi,

for some reason the line "cout << "Enter your name : "; getline(cin, name);" is acting up. can someone please check it out for me? i'm using it with vectors and a class.

file.cpp

Code:

#include <iostream>
#include <string>
#include <vector>
#include "file.h"
using namespace std;

int my_class::askUser()
{
	cout << "Enter your name : ";	getline(cin, name);
	cout << "building number : ";	cin >> build_num;
	cout << "apartment number: ";	cin >> apt_num;
//	cout << "Enter your name : ";	getline(cin, name);     //placing it here gives me the same problem
return 0;
}

void my_class::dispInfo() const
{
	cout << "customer name is "		<< name			<< endl;
	cout << "building number is "	<< build_num	<< endl;
	cout << "apartment number is "	<< apt_num		<< endl;
}

int main()
{
vector<my_class> one(6); int i;

		for(i=0; i<one.size(); i++)
		{
		one[i].askUser();
		one[i].dispInfo();
		}

return 0;
}

file.h

Code:

#include <iostream>
#include <string>
using namespace std;

class my_class
{
public:
	int askUser();
	void dispInfo() const;

private:
	int build_num;
	int apt_num;
	string name;
};

on run, after the first execution of the loop, it should ask for the the string input again but it skips it. i have no idea how to correct it. the logic is perfect i think.

thanks,
barneygumble742

so what can i use besides getline that will work? i would like to try getc but isn't that only for characters?

Continue to use getline, but after you call cin >> you must ignore the extra newline. The simple way to do that is to add cin.ignore(); between a call to cin>> and a call to getline.

could you explain where to put the cin.ignore(); ?

i put it at the very top and after the getline and both ways it acts very weird.

Code:

cout << endl;
cin >> myvariable;
cin.ignore();
cout << endl;
getline(cin, myvariable2);

hi...this is what i did and it works fine and i'm able to put it in the member function regardless the location. i don't know why i didn't think of this to begin with.

Code:

int my_class::askUser()
{
string first, last;
	cout << "Enter your name : ";	cin >> first >> last;
		name = first + " " + last;
	cout << "building number : ";	cin >> build_num;
	cout << "apartment number: ";	cin >> apt_num;
return 0;
}

thanks again everyone. i'm keeping all your recommendations.