#define N 3#define Y(n) ((N+1)*n)s=2*(N+Y(5+1))printf(d%,s)問s結(jié)果是多少？為什么？
熱心網(wǎng)友
s=2*(N+Y(5+1)) =2*(3+((N+1)*5+1) =2*(3+((3+1)*5+1) =48Y(5+1)=((N+1)*5+1)由于n在等式右邊沒加括號(hào),用define定義時(shí),會(huì)直接用5+1代替n,而不會(huì)先把5+1算出來再代替n
熱心網(wǎng)友
48
#define N 3#define Y(n) ((N+1)*n)s=2*(N+Y(5+1))printf(d%,s)問s結(jié)果是多少？為什么？
s=2*(N+Y(5+1)) =2*(3+((N+1)*5+1) =2*(3+((3+1)*5+1) =48Y(5+1)=((N+1)*5+1)由于n在等式右邊沒加括號(hào),用define定義時(shí),會(huì)直接用5+1代替n,而不會(huì)先把5+1算出來再代替n
48