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Join Date: Dec 2007

Posts: 5

Reputation: raniajay is an unknown quantity at this point

Solved Threads: 0

raniajay

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Newbie Poster

c++ query

Dec 31st, 2007

i have tried to do the pascals law in the following method .....bt i m not getting a triangle shape.could someone help me out in this tight Spot?? here is the code what i have typed...

 Help with Code Tags 
 c Syntax (Toggle Plain Text) 
#include<iostream.h>
#include<conio.h>
#include<iomanip.h>
long TRIANGLE(int x,int y);
int main()
{
clrscr();
int lines=0,n;
cout<<"enter how many lines";
cin>>n;
for(lines=0;lines<=n;lines++)
{
for(int i=0;i<lines;i++)
for(int j=0;j<lines-n;j++)
cout<<setw(2)<<" ";
for(j=0;j<=i;j++)
cout<<setw(4)<< TRIANGLE(i,j);
cout<<endl;
}
getch();
}
long TRIANGLE(int x,int y)
{if(x<0||y<0||y>x)
return 0;
long c=1;
for (int i=1;i<=y;i++,x--)
c=c*x/i;
return c;
}
#include<iostream.h>
#include<conio.h>
#include<iomanip.h>
long TRIANGLE(int x,int y);
int main()
{
clrscr();
int lines=0,n;
cout<<"enter how many lines";
cin>>n;
for(lines=0;lines<=n;lines++)
{
for(int i=0;i<lines;i++)
for(int j=0;j<lines-n;j++)
cout<<setw(2)<<" ";
for(j=0;j<=i;j++)
cout<<setw(4)<< TRIANGLE(i,j);
cout<<endl;
}
getch();
}
long TRIANGLE(int x,int y)
{if(x<0||y<0||y>x)
return 0;
long c=1;
for (int i=1;i<=y;i++,x--)
c=c*x/i;
return c;
}

Last edited by Ancient Dragon; Dec 31st, 2007 at 5:57 pm. Reason: add code tags

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Join Date: Jul 2005

Posts: 1,678

Reputation: Lerner is a name known to all

Solved Threads: 263

Lerner

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Posting Virtuoso

Re: c++ query

Dec 31st, 2007

First, remember to post code surrounded by code tags to retain indentation to make the code easier to read.

Assuming you want the peak of the triangle centered over the base then I would would calculate the numbers and put them into a container printing the container once all calcualtions were done and not print the numbers to the screen on the fly. I'd consider using nested loops to control the display of the triangle using leading spaces followed by visible values followed by trailing spaces (though the trailing spaces are more conceptual than real).
How many spaces will be needed will depend on how many lines are displayed, how many characters will be needed in the display of the last line, and how many digits there are in the largest number contained within the triangle.

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Join Date: Oct 2006

Posts: 514

Reputation: Jishnu will become famous soon enough

Solved Threads: 26

Jishnu

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Posting Pro

Re: c++ query

Jan 1st, 2008

Hey raniajay, you'd be happy that C++ has provided standard libraries without the .h extension since long. You can simply write

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#include <iostream>

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