使用VC6打开考生文件夹下的工程test26_1,此工程包含一个源程序文件test26_1.cpp,但该程序运行有问题,请改正函数中的错误,使该程序的输出结果为: Values are: 1,2 and 3 源程序文件test26_1.cpp清单如下; #include <iostream.h> class CommonBase { public:int x; };/*****************found*****************/class DeriveCommonA::public CommonBase{ public:int y;}; class DeriveCommonB:public CommonBase { public:int z; }; /*****************found*****************/class Overlapping:public DeriveCommonA; public DeriveCommonB { public:void Display(){ cout<<"Values are: "<<DeriveCommonA::x<<", "<<y<<" and "<<z<<end1;} }; int main ( ){ Overlapping ov;/*****************found*****************/ ov.x=1; ov.y=2; ov.z=3; ov.Display(); return 0;}