【单选题】【消耗次数：1】
若有定义：unionu_type{intx;floaty[3];charz;}a;则变量a的长度是（）。
①
1
②
4
③
12
④
15
参考答案：
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相关题目
【单选题】
若有定义：intx,a;赋值语句a=(x%3==0)?0:1;与（）语句不等价。
①
if(x%3!=0)a=1;elsea=0;
②
if(x%3)a=0;elsea=1;
③
if(x%3==0)a=0;elsea=1;
④
if(!(x%3==0))a=1;elsea=0;
【单选题】
若有以下说明，int？a[12]={1，2，3，4，5，6，7，8，9，10，11，12}；？则数值为4的表达式是（）
①
a[4]
②
a（3）
③
a[3+1]
④
a[4]-a[0]
【单选题】
若已定义：intx=7;floaty=7.0;以下语句中能输出正确值的是（）。
①
printf("%d%d",x,y);
②
printf("%d%.3f",x,y);
③
printf("%.3f%.3f",x,y);
④
printf("%.3f%d",x,y);
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