programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
• Campbell Ritchie
• Jeanne Boyarsky
• Ron McLeod
• Paul Clapham
• Liutauras Vilda
Sheriffs:
• paul wheaton
• Rob Spoor
• Devaka Cooray
Saloon Keepers:
• Stephan van Hulst
• Tim Holloway
• Carey Brown
• Frits Walraven
• Tim Moores
Bartenders:
• Mikalai Zaikin

# Expalin the answer -- Arrays

Ranch Hand
Posts: 267
• Number of slices to send:
Optional 'thank-you' note:
19. If size = 4, triArray looks like:

int[][] makeArray( int size)
{ int[][] triArray = new int[size] [];
int val=1;
for( int i = 0; i < triArray.length; i++ )
{ triArray[i] = new int[i+1];
for( int j=0; j < triArray[i].length; j++ )
{ triArray[i][j] = val++;
}
}
return triArray;
}

a)
1 2 3 4
5 6 7
8 9
10
b)
1 4 9 16
c)
1 2 3 4
d)
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
e)
1
2 3
4 5 6
7 8 9 10

Author & Gold Digger
Posts: 7617
6
• Number of slices to send:
Optional 'thank-you' note:
I think the right answer is e...
Try and run it but at a first sight e seems to be the right answer...
Val

Ranch Hand
Posts: 464
• Number of slices to send:
Optional 'thank-you' note:
When you run it
it prints
1
2
3
4
5
6
7
8
9
10
So is both a and e correct?
I am confused
Can someone explain how the code is working?
Thankx

Valentin Crettaz
Author & Gold Digger
Posts: 7617
6
• Number of slices to send:
Optional 'thank-you' note:
it's not a matter of printing it is a matter of HOW the arrays look like...
the first array has one element: 1
the second array has two elements: 2 3
the third array has three elements: 4 5 6
the fourth array has four elements: 7 8 9 10
so answer e is correct !!
Val

Ranch Hand
Posts: 282
• Number of slices to send:
Optional 'thank-you' note:

Originally posted by Roopa Bagur:
19. If size = 4, triArray looks like:

int[][] makeArray( int size)
{ int[][] triArray = new int[size] [];
int val=1;
for( int i = 0; i < triArray.length; i++ )
{ triArray[i] = new int[i+1];
for( int j=0; j < triArray[i].length; j++ )
{ triArray[i][j] = val++;
}
}
return triArray;
}

a)
1 2 3 4
5 6 7
8 9
10
b)
1 4 9 16
c)
1 2 3 4
d)
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
e)
1
2 3
4 5 6
7 8 9 10

Valentin Crettaz
Author & Gold Digger
Posts: 7617
6
• Number of slices to send:
Optional 'thank-you' note:
Good job Amit !!
Val

Roopa Bagur
Ranch Hand
Posts: 267
• Number of slices to send:
Optional 'thank-you' note:
Excellent everybody thankyou

Originally posted by Roopa Bagur:
19. If size = 4, triArray looks like:

int[][] makeArray( int size)
{ int[][] triArray = new int[size] [];
int val=1;
for( int i = 0; i < triArray.length; i++ )
{ triArray[i] = new int[i+1];
for( int j=0; j < triArray[i].length; j++ )
{ triArray[i][j] = val++;
}
}
return triArray;
}

a)
1 2 3 4
5 6 7
8 9
10
b)
1 4 9 16
c)
1 2 3 4
d)
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
e)
1
2 3
4 5 6
7 8 9 10