C++
1:单选(2分Q) 下列程序的输出结果是( )。v5#include <iostream.h>void main(){ int a[5]={2,4,6,8,10}; int *p=a,**q=&p; cout<<*(p++)<<','<<**q;} _&QTHZT9/?: bRuJ7WAdzU UR0_+8D0QgSWSqtTX #U2o$kk$O_Eyj
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21:单选(2分G) #include <iostream.h>#include <math.h>class point{ public:point(double xx,double yy){x=xx;y=yy;}void getxy();friend double distance(point &a,point &b); private:double x,y;};void point::getxy(){ cout<<〃(〃<<x<<〃,〃<<y<<〃)〃<<endl;}double distance(point &a,point &b){ double dx=a.x-b.x; double dy=a.y-b.y; return sqrt(dx*dx+dy*dy);}void main(){point p1(3.0,4.0),p2(6.0,8.0);p1.getxy();p2.getxy();double d=distance(p1,p2);cout<<d<<endl;} Bm#HEv:+:uk. ozyqbviUMR`0/Ue `$CAO-aY*Q@FvL/A= H?8+=F2u'FM?9'$N[
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