Solved

c++ zigzag pattern setw

Posted on 2011-09-15
4
1,405 Views
Last Modified: 2013-03-08
Hello, i'm stuck ones again.... the code should generate a zigzag something like this

Please enter the maximum field width: 9
Enter the microseconds to pause between asterisks: 50000
*
 *
  *
   *
    *
     *
      *
       *
        *
       *
      *
     *
    *
   *
  *
 *
*
 *
  *
   *
    *
     *
      *
       *
        *
       *
      *
     *
    *
   *
  *
 *
*
 *
  *
   *
    *
     *
      *
       *
        *
       *
      *
     *
    *
   *
  *
 *
*
^C
my code below kinds of works but i don't know what i'm doing wrong any help would be great thanks

#include <iostream>
#include <cstdlib>
#include <iomanip>
using namespace std;

int main(void)
{

  int width;
  int interval;
  cout <<"Please enter the maximum field width: ";
  cin>> width;
  cout <<"Enter the micrososeconds to pause between asterisks: ";
  cin >> interval;

int n =1;

while (n <=width)
{
   cout <<(setw(n)) << "*" <<endl;
   n++;

}

while (true)

{

for(n =1; n<=width; n++)
cout << setw(n) <<"*" <<endl;

for(n=width; n > 1; n--)
cout << setw(n) <<"*" <<endl;
usleep(interval);


}

}

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0
Comment
Question by:businessesatoz
4 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 250 total points
ID: 36545343
Well, the only thing that is wrong is that you are printing the 'topmost' star twice, so when counting doen, start at 'width - 1', i.e.
#include <iostream>
#include <cstdlib>
#include <iomanip>
using namespace std;

int main(void)
{

  int width;
  int interval;
  cout <<"Please enter the maximum field width: ";
  cin>> width;
  cout <<"Enter the micrososeconds to pause between asterisks: ";
  cin >> interval;

int n =1;

while (n <=width)
{
   cout <<(setw(n)) << "*" <<endl;
   n++;

}

while (true)

{

for(n =1; n<=width; n++)
cout << setw(n) <<"*" <<endl;

for(n=width - 1; n > 1; n--) // <-- here
cout << setw(n) <<"*" <<endl;
usleep(interval);


}

return 0; // that should be added as well
}

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0
 
LVL 8

Assisted Solution

by:ssnkumar
ssnkumar earned 250 total points
ID: 36547320
You have not explained your problem properly.
When I run your program, I get the following o/p:

Please enter the maximum field width: 5
Enter the micrososeconds to pause between asterisks: 100000
*
 *
  *
   *
    *
*
 *
  *
   *
    *
   *
  *
 *
*
I see that, in the beginning, you are having one slope and the opposite slope is not there.
After that, everything is ok.
If this is the problem, then remove the following lines (from line#18 to 23 in your post):
 
while (n <=width)
{
   cout <<(setw(n)) << "*" <<endl;
   n++;

}

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And your code runs forever.
I think, you are doing that on purpose.
0
 

Author Closing Comment

by:businessesatoz
ID: 36558071
thank you all for your help.
0
 

Expert Comment

by:DK88
ID: 38967524
How could this program be stopped by entering Ctrl+C?
0

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