Why doesn't this loop work? - Printable Version

Why doesn't this loop work? - Printable Version

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+---- Thread: Why doesn't this loop work? (/showthread.php?tid=2797)

Why doesn't this loop work? - nevets04 - 11-10-2009

Code:
#include <iostream>

using namespace std;int main(){int x=1;while(x<=99){x=x+1;cout<<x<< endl;return 0;}}

The output is 2, why isn't it:
2
3
4
5
6
7
8
9
10
etc...

RE: Why doesn't this loop work? - Gaijin - 11-11-2009

Because you return the function within the while loop....

Your code

Code:
return 0;}}

Right code

Code:
}return 0;}

RE: Why doesn't this loop work? - Etheryte - 11-11-2009

Using return will stop the program in it's track, no matter what operation it's currently undergoing. For example, you can use return 1 for error checking.

RE: Why doesn't this loop work? - MrD. - 11-11-2009

(11-10-2009, 11:45 PM)nevets04 Wrote:
Code:
#include <iostream> using namespace std;int main(){int x=1;while(x<=99){x=x+1;cout<<x<< endl;return 0;}}

Please tell me you don't really lay your code out like that?

Code:
#include <iostream>

using namespace std;

int main()

{

    int x=1;

    while(x<=99)

    {

        x=x+1;

        cout<<x<< endl;

        return 0;

    }

}

Makes it much clearer why it is going wrong (because return is inside the loop). Also you might want to look into a for loop (and pre/post increment operators).

Code:
#include <iostream>

using namespace std;

int main()

{

    for(int x = 1; x <= 99; ++x)

        cout << x << endl;

    return 0;

}

RE: Why doesn't this loop work? - nevets04 - 11-11-2009

(11-11-2009, 07:14 AM)MrD. Wrote: Please tell me you don't really lay your code out like that?

Code:
#include <iostream> using namespace std; int main() { int x=1; while(x<=99) { x=x+1; cout<<x<< endl; return 0; } }
Makes it much clearer why it is going wrong (because return is inside the loop). Also you might want to look into a for loop (and pre/post increment operators).

Code:
#include <iostream> using namespace std; int main() { for(int x = 1; x <= 99; ++x) cout << x << endl; return 0; }

I do that for shorter programs

RE: Why doesn't this loop work? - Sagittarius - 12-11-2009

so so simple...

your return 0; will return to OS ... not return to loop