单选题:有下列程序: #include<stdi0.h>#definePT3.5; #defineS(x)PT*x*x; voi

  • 题目分类:C++
  • 题目类型:单选题
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题目内容:
有下列程序:
#include<stdi0.h>
#definePT3.5;
#defineS(x)PT*x*x;
voidmain(  )
(inta=1.b=2;printf("%4.1f\n",S(a+b));}
程序运行后的输出结果是(  )。 A.14.0
B.31.5
C.7.5
D.程序有错,无输出结果

参考答案:
答案解析:

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