使用VC6打开考生文件夹下的工程test42_1,此工程包含一个源程序文件test42_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: rect area: 12 rectb area: 30 源程序文件test42_1.cpp清单如下: #include <iostream.h> class CRectangle {/***************** found *****************/int *width, height; public: CRectangle (int,int); ~CRectangle (); int area (void) {return (*width * *height);} }; CRectangle::CRectangle (int a, int b) {width = new int;height = new int;/***************** found *****************/width = a;*height = b; } CRectangle::~CRectangle () {delete width;delete height; } /***************** found *****************/ void main () {CRectangle rect (3,4), rectb (5,6);cout << "rect area: "<< rect.area() << endl;cout << "rectb area: "<< rectb.area() << endl;return 0; }