C++第9次作业.doc

实验 定义计数器Counter类，对其重载运算符 + 。 实验代码： #include iostream.h class counter { private: int n; public: counter( ) { n=0;} counter(int i) {n=i;} counter operator+(counter c) { counter temp; temp.n=n+c.n; return temp; } void disp( ) { coutn=nendl; } }; void main() { counter c1(15),c2(10),c3; c3=c1+c2; c1.disp(); c2.disp(); c3.disp(); } 实验结果： 实验代码： #include iostream.h class BaseClass { public: void fn1(); void fn2(); }; void BaseClass::fn1() { } void BaseClass::fn2() { cout 调用基类的函数fn2() endl; } class DerivedClass : public BaseClass { public: void fn1(); void fn2(); }; void DerivedClass::fn1() { cout 调用派生类的函数fn1() endl; } void DerivedClass::fn2() { cout 调用派生类的函数fn2() endl; } void main() { DerivedClass aDerivedClass; DerivedClass *pDerivedClass = aDerivedClass; BaseClass *pBaseClass = aDerivedClass; aDerivedClass.fn1(); aDerivedClass.fn2(); pBaseClass-fn1(); pBaseClass-fn2(); pDerivedClass-fn1(); pDerivedClass-fn2(); } 实验结果： 实验代码：#includeiostream using namespace std; int Double(int a){return 2.0*a;} long int Double(long int a){return 2*a;} float Double(float a){return 2.0*a;} double Double(double a){return 2.00000*a;} void main(){ int m; cout输入一个整型数：; cinm; cout它的两倍是Double(m)endl; long int p; cout输入一个长整型数：; cinp; cout它的两倍是Double(p)endl; float r; cout输入一个浮点型数：; cinr; cout它的两倍是Double(r)endl; double n; cout输入一个双精度数：; cinn; cout它的两倍是Double(n)endl; } 实验结果： 实验代码： #includeiostream.h class complex { private: double real; double imag; public: complex() { real=imag=0; } complex(double rpart,double ipart) { real=rpart; imag=ipart; } complex operator+(const complex com) { complex temp; temp.real=real+com.real; temp.imag=imag+com.imag; return temp; } complex operator-(const complex com) { complex temp; temp.real=real-com.real; temp.imag=imag-com.imag; return temp; } complex operator*(const complex