C programming - iterative method

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it is my code.. all the lecturer gave ups was the newton raphson method formula which is the formula i've put in my while loop. i've changed the diff to diff so that is an array also but i don't believe this is correct. my lecturer stated that we'd basically be using arrays for all the assessment exercises :frown:

Reply 21

caaakeeey

Python would be so much easier.

Example:

def derivative (f, x, h):
    return float((f(x + h) - f(x))) / h
 
def solve(f, x0, h, depth):
    if depth > 0:
        delta = f(x0) / derivative(f, x0, h)
        return solve(f, x0 - delta, h, depth - 1)
    else:
        return x0

Reply 22

Mathmoid

caaakeeey

Python would be so much easier.

Example:

def derivative (f, x, h):
    return float((f(x + h) - f(x))) / h
 
def solve(f, x0, h, depth):
    if depth > 0:
        delta = f(x0) / derivative(f, x0, h)
        return solve(f, x0 - delta, h, depth - 1)
    else:
        return x0

C would be so much easier.

Example:


double derivative( double(*f)(double), double x, double h )
{
    return ( f( x  + h ) - f( x ) ) / h;
}

double solve( double(*f)(double), double x0, double h, int depth )
{
    if (depth > 0)
    {
        double delta = f(x0) / derivative( f, x0, h );
        return solve( f, x0 - delta, h, depth - 1 );
    }

    return x0;
}