问答题

本题将一个整形变量op1的二进制的低3位全部变成1。
public class java1
public static void main(String[]args)
op1=21;
int op2=7;
res;
__;
System.out.println(res);

【参考答案】

第1处：int
第2处：int
第3处：res=op1|op2

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