Thread: FOR cycle problem

Originally Posted by whiteflags

I'm pretty sure you wrote hatvany() wrong. alap *= alap; doesn't really help much.

Well, but it's inside the loop -- this is binary exponentiation. So x^9 = x^8 * x (since that's the binary representation of 9), and the repeated squaring of alap gives alap^2, alap^4, alap^8, etc., so that when the right-most bit of the power is one the correct power of alap gets multiplied in.

Originally Posted by gyilki

. . . i had to write an own power, cuz cannot use math.h

Why? The function exp() need "math.h". You use the name of a C function for a variable (int exp). . . that's not well.

C library function exp()

Originally Posted by Kernelpanic

Why?

Teachers are weird. (But yes, using a reserved name for a function parameter is a Bad Idea.)

Solved, i rewrote the whole code and it works! Thanks for helping me guys!