题目内容

设有声明floata=1.23456;intb;,欲将a中的数值保留小数点后两位,第三位进行四舍五人运算，能实现该功能的表达式是（）

A. b=a100+0.5，a=b/100.0
B. a=(a100+0.5)/100.0
C. a=((int)a*100+0.5)/100.0
D. a=(a/100+0.5)/100.0

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