Try this one
int
fib(int n)
{
int x, a, b;
x = 1; a = 1; b = 0;
while( x <= n )
{
int temp = a+b;
b = a;
a = temp;
x = x+1;
}
return a;
}
{
int x, a, b;
x = 1; a = 1; b = 0;
while( x <= n )
{ int temp = a+b; b = a; a = temp; x = x+1; }return a;}
fib(n) =