如下程序运行时输出的第一行和第二行分别是()和()。#includeusingnamespacestd;classA{intx,y,z;public:A(intvx,intvy,intvz){x=vx;y=vy;z=vz;}A(){x=0;y=0;z=0;}Aoperator+(At){Ate;te.x=x+t.z;te.y=y+t.y;te.z=z+t.z;returnte;}Aoperator-(At){Ate;te.x=x-t.z;te.y=y-t.y;te.z=z-t.z;returnte;}Aoperator=(At){x=t.x;y=t.y;z=t.z;return*this;}voidprint(){cout<