你这个程序,我排列了一下,你可以看到,并不是所有的情况,y都会获得一个值,所以不在处理范围内你也需要为y给定一个值,这样就需要对y定义初始值,比如0.0 double xuanzhi2(double xx,double x)//getyh { double y=0.0; if(xx>=0) { if(xx
程序出错：The variable 'y' is being used without being
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