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Õâ¸öÇóÒ»¸öÃæ·¨ÏòÁ¿µÄ¼òµ¥³ÌÐò³öÁËʲôÎÊÌ⣬¸ßÊÖÖ¸µãÏ ÒÑÓÐ1È˲ÎÓë
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Ïëд¸öС³ÌÐò£¬ÇóÈÏʶ3µãËùÈ·¶¨µÄÆ½Ãæ·¨ÏòÁ¿£¬×ÜÊdzö´í£¬ÓÐûÓиßÊÖÖ¸µãÏ£¿Ð»Ð»¡£ #include <iostream> using namespace std; class point{ public: double x,y,z; }; class crproduct:point { public: double x1,x2,x3,y1,y2,y3,z1,z2,z3,Ax,Ay,Az,Bx,By,Bz; point crproduc(point *a,point *b,point *c) { //point a x1=(*a).x; y1=(*a).y; z1=(*a).z; //point b x2=(*b).x; y2=(*b).y; z2=(*b).z; //point c x3=(*c).x; y3=(*c).y; z3=(*c).z; //Vector A Ax=x1-x2; Ay=y1-y2; Az=z1-z2; //vector B Bx=x2-x3; By=y2-y3; Bz=z2-z3; //cross product point vector; vector.x = (Ay*Bz)-(By*Az); vector.y = -(Ax*Bz)+(Bx*Az); vector.z = (Ax*By)-(Ay*Bx); return vector; } }; int main () { point *pp,*p1,*p2; point cd; crproduct cr1,cr2,cr3,cr4; (*pp).x=12; (*pp).y=13; (*pp).z=15 (*p1).x=10; (*p1).y=10; (*p1).z=10; (*p2).x=8; (*p2).y=5; (*p2).z=2; cd=cr1.crproduc(pp,p1,p2); cout<<cd.x<<" "<<cd.y<<" "<<cd.z<<endl; system("pause" ;return 0; } |
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