A little help with for statement
Author
I got this code from Problem solving with C++ by Walter Savitch.
I''m confused with the second output 4 8 12 16! I mean how did a
for (i=0;i<10;i=i+2)
cout<<<"";
got an out put of 0 4 8 12 16?
int i, temp[10]
for (i=0;i<10;i++)
temp=2*i;
for (i=0;i<10;i++)
cout<<temp<<"";
cout<<end1;
for (i=0;i<10;i=i+2)
cout<<temp<<"";
output
0 2 4 6 8 10 12 14 16 18
0 4 8 12 16
</i>
<b>Flamers are worst than Newbies<b>
Uh... Could you please add code or source tags to your post? The code you posted is pretty unreadable otherwise 
Author
Sorry bout that. Here it is.
The output of the code is:
0 2 4 6 8 10 12 14 16 18
0 4 8 12 16
I''m confused with the second output. I mean, how did the second output produced a 0 4 8 12 16?
Flamers are worst than Newbies
int i, temp[10]for (i=0;i<10;i++)temp[i]=2*i;for (i=0;i<10;i++) cout<<temp[i]<<"";for (i=0;i<10;i=i+2) cout<<temp[i]<<'''';The output of the code is:
0 2 4 6 8 10 12 14 16 18
0 4 8 12 16
I''m confused with the second output. I mean, how did the second output produced a 0 4 8 12 16?
Flamers are worst than Newbies
int i, temp[10]for (i=0;i<10;i++) temp[i]=2*i; This sets temp to 0,2,4,6,8,10,12... and so on
for (i=0;i<10;i++) cout<<temp[i]<<""; cout<<endl; Just output temp
for (i=0;i<10;i=i+2) cout<<temp[i]<<""; Output every other element from temp (since i is increased by two each iteration.)
[edited by - TomasH on May 26, 2004 7:25:58 AM]
quote:Original post by Makoy
int i, temp[10]for (i=0;i<10;i++)temp[i]=2*i;for (i=0;i<10;i++) cout<<temp[i]<<"";for (i=0;i<10;i=i+2) cout<<temp[i]<<'';//The output of the code is:0 2 4 6 8 10 12 14 16 180 4 8 12 16
I'm confused with the second output. I mean, how did the second output produced a 0 4 8 12 16?
The first two for loops run from 0 to 9 with a step of one (i++). So you get 0,1,2,3,4,5,6,7,8,9
The last for loop increases i by 2. So you get 0,2,4,6,8 and it executes the cout for each value.
[edited by - Fidelio66 on May 26, 2004 7:28:08 AM]
Yup, don''t forget that you''re outputting what''s stored in the i''th element in the "temp" array and not the iterator i itself.
for (i=0;i<10;i=i+2)
cout<<<'''';
So you''re outputting the contents of temp[0], temp[2], temp[4], temp[6], and temp[8], which is 0, 4, 8, 12, 16 respectively.
for (i=0;i<10;i=i+2)
cout<<<'''';
So you''re outputting the contents of temp[0], temp[2], temp[4], temp[6], and temp[8], which is 0, 4, 8, 12, 16 respectively.
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
