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for loop challenge

  • 20-07-2009 10:41am
    #1
    liamw
    Closed Accounts Posts: 1,780 ✭✭✭


    Hi,

    Does anyone know how to solve this? I can do it using an external variable outside the loops, but what's the best way?

    Use nested fors to solve this...

    1
    23
    456
    78910


Comments

  • #2
    padraig_f
    Registered Users, Registered Users 2 Posts: 3,323 ✭✭✭padraig_f


    shouldn't the last line be: 7890 ?


  • #3
    padraig_f
    Registered Users, Registered Users 2 Posts: 3,323 ✭✭✭padraig_f


    oh I see, that's a 10 at the end, thought it was 1 followed by 0.

    Here's my effort. There's nothing wrong with using an external variable. I declared it as part of the for statement.
    for( int i = 1, length = 1;  i <= 10; i += length++ )
{
   for( int j = i; j < (i+length);  j++ )
      cout<< j % 10;
   cout<< endl;
}

    I modded the output with 10 so it gives a more pleasing pattern: 
    1
23
456
7890


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