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B.2k-1¸ö½áµã
C.2k-1¸ö½áµã
D.2k-1-1¸ö½áµã
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D.ÎïÀíÄ£ÐÍ
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#include
long fib(int n)
{
long res;
switch (n)
}
case 0:res=0;break;
case 1:res=1;break;
default:res=fib(n-1)+fib(n-2);
}
return (res);
}
main()
{
printf(¡°%ld ¡±,fifb(6));
}
A.5
B.8
C.13
D.21