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Null Character VS Space

 
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Null Character VS Space, I'm a bit confused.
ljfox4
post 16 Jul, 2007 - 04:25 PM
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I've been programming for years and I still tend to wonder about something. First, an example:

CODE

#include <iostream>

using namespace std;

int main()
{
    char name[32] = {'\0'};
    cout<<"Enter your name\n";
    cin>>name;
    cout<<"Hello, "<<name<<".\n";
    return 1;
}


I know it is lacking code to prevent overflowing the char buffer, but that's not the point. I'm curious as to why if I enter "John Doe", then the final result displays "Hello, John."

I've always been under the impression that a NULL character and only a NULL character terminates a NULL-terminated string. As far as I have known, a space is just another character.

That's been bugging me for a while, so please, any and all replies are appreciated.
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MorphiusFaydal
post 16 Jul, 2007 - 04:43 PM
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QUOTE(ljfox4 @ 16 Jul, 2007 - 05:25 PM) *

I've been programming for years and I still tend to wonder about something. First, an example:

CODE

#include <iostream>

using namespace std;

int main()
{
    char name[32] = {'\0'};
    cout<<"Enter your name\n";
    cin>>name;
    cout<<"Hello, "<<name<<".\n";
    return 1;
}


I know it is lacking code to prevent overflowing the char buffer, but that's not the point. I'm curious as to why if I enter "John Doe", then the final result displays "Hello, John."

I've always been under the impression that a NULL character and only a NULL character terminates a NULL-terminated string. As far as I have known, a space is just another character.

That's been bugging me for a while, so please, any and all replies are appreciated.


The string itself may be NULL-terminated, but the "cin" function cuts off at a space or a newline.
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ljfox4
post 16 Jul, 2007 - 04:52 PM
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Oh alright, thank you. And what can I use as an alternative to cin?
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MorphiusFaydal
post 16 Jul, 2007 - 05:10 PM
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QUOTE(ljfox4 @ 16 Jul, 2007 - 05:52 PM) *

Oh alright, thank you. And what can I use as an alternative to cin?


getline()

Example:
CODE

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

void main() {
    string name;

    cout << "Please enter your name. >> ";
    getline(cin, name);

    cout << "Hello there, " << name << "!" << endl;

    return 0;
}


CODE
Please enter your name. >> John Doe
Hello there, John Doe!
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ljfox4
post 16 Jul, 2007 - 05:13 PM
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Alright. Thank you so much for your help. I appreciate it.
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Amadeus
post 16 Jul, 2007 - 05:37 PM
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g++ -o drink whiskey.cpp

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As long as you're using cin, you may as well use the getline() method of cin, as opposed to the standalone function:
cin.getline()
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