Question

#define N 3 #define Y(n) ( (N+1)*n) 则执行语句:z=2 * (N+Y(5+1));后,z的值为

Answer 1

#define N 3
#define Y(n) ( (N+1)*n)

z
=2 * (N+Y(5+1))
=2 * (N+((N+1)*5+1)) //注意由于#define Y(n) ( (N+1)*n) 中n没有用括号括上，所以这里是*5+1，不是*(5+1)
=2 * (3+((3+1)*5+1))
=2 * (3+(4*5+1))
=2 * (3+21)
=2 * 24
=48

Answer 2

N=3;
Y(n)=(3+1)*n=4n;
z=2*(3+Y(6))=2*(3+4*6)=2*27=54

z的值是54