---

Ackerman Function with ANSI C compilator

I need to solve an Ackerman using the ANSI C.
The function is:

F(0,0,y)=y

F(0,x,y)=F(0,x-1,y)+1 per x diverso da 0

F(1,0,y)=0

F(z,0,y)=1 per z diverso da 0,1

F(z,x,y)=F(z-1,F(z,x-1,y),y) per x,z diversi da 0




other define:

A(0,j)= j+1 j>0

A(i,0)= A(i-1,1) i>0

A(i,j)= A(i+1),A(i,j-1) i,j>0




Could you help me??

THANKS!!!