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pascals triangle

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Join Date: Aug 2004

Posts: 17

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let us c

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pascals triangle

Aug 26th, 2004

hi
i want to display pascals triangle on computer screen.the pascals triangle
goes like this. and what is logic.
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1 and so on.

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Join Date: Aug 2004

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ganesh

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Re: pascals triangle

Aug 28th, 2004

Hi there are many logics behind this problem. This is the simple logic. Though it is inefficient, this will give you a better approach to this program

a[0] = 1
for(i=0;i<n;i++){
for(j=0;j<=i;j++){
Value_to_print = a[j-1]+a[j];
/* Print the values in the order you want */
}
a[j] = 0
a[j-1] = Value_to_print
}

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Join Date: Aug 2004

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iamboredguy iamboredguy is offline

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Re: pascals triangle

Sep 2nd, 2004

Well, you can try this code, but I don't know if it will work beyond n=9.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream.h>
#include <conio.h>
 
/* This program creates a half pyramid of nos. Created on 12.6.2k3. */
 
void main()
 
{
 int n, i, r;
 cout<<"Enter the number of numbers: ";
 cin>>n;
 if (n>9)
 cout<<"\n This won't work out. ";
 else
 {
  for (i=1; i<=n; i++)
  {
   for (r=1; r<=i; r++)
   {
    cout<<r;
   }
   cout<<endl;
  }
 }
 getch();
}
 
/* Output:
Enter the number of numbers: 7
1
12
123
1234
12345
123456
1234567
 
*/
#include <iostream.h>
#include <conio.h>

/* This program creates a half pyramid of nos. Created on 12.6.2k3. */

void main()

{
 int n, i, r;
 cout<<"Enter the number of numbers: ";
 cin>>n;
 if (n>9)
 cout<<"\n This won't work out. ";
 else
 {
  for (i=1; i<=n; i++)
  {
   for (r=1; r<=i; r++)
   {
    cout<<r;
   }
   cout<<endl;
  }
 }
 getch();
}

/* Output:
Enter the number of numbers: 7
1
12
123
1234
12345
123456
1234567

*/

btw, I didn't know it was called a pascal's triangle. I used to refer to it just as a no. pyramid or whatever.