【单选题】【消耗次数：1】
以下程序输出结果是（ ）。
Main()
{int x=2,y=-1,z=2;
if(xy)
if(y0) z=0;
else z+=1;
printf(%d\n
}
①
3
②
2
③
1
④
0
参考答案：
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③
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②
<img src=https://huaweicloudobs.ahjxjy.cn/BBE7B8CB85A645EA04108FA7568B046A.png title=Unnamed QQ Screenshot20170106221451.png alt=Unnamed QQ Screenshot20170106221451.png/>
③
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④
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③
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2
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3
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-3
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8
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6