Pascal's Triangle - print a row

Question

Paul · Accepted Answer

Any given row? So:

// n is the row desired, and i'm assuming 1-index on rows, i.e.
// the 1st row is 1, 2nd is 1, 1 rathere than 0th row is 1

void pascal(int a[ ], int size, int n)
{
    n--;
    if(n == 0)
    {
        for(i = 0; i < size; i++)
           printf("%d", a[i]); 
        return;
    }
    int b[size + 1];
    b[0] = 1;
    b[size + 1] = 1;
    for(int i = 1; i < size; i++)
        b[i] = a[i - 1] + a[i];
   pascal(b, size + 1, n);
}

Ryan · Answer

Just prints the numbers; doesn't handle spatial separators between numbers.

// Computes the value at row r and column c
def v(r:Int, c:Int) : Int = 
  if (c == 0) 1 else v(r, c-1) * (r-c)/c

def printRow(r:Int) = 
  for (col <- 0 to r) print( v(r+1, col) )

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