2-6-6 类模版

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问题及代码：

#include <iostream>using namespace std;template <class T>class Complex{public:    Complex():real(0),imag(0){};    Complex(T r,T i):real(r),imag(i){};    Complex complex_add(Complex &c1);    Complex complex_sub(Complex &c1);    Complex complex_mul(Complex &c1);    Complex complex_div(Complex &c1);    void display();private:    T real;    T imag;};template <class T>Complex<T> Complex<T>::complex_add(Complex<T> &c1){    Complex<T> c;    c.real=c1.real+real;    c.imag=c1.imag+imag;    return c;}template <class T>Complex<T> Complex<T>::complex_sub(Complex<T> &c1){    Complex<T> c;    c.real=real-c1.real;    c.imag=imag-c1.imag;    return c;}template <class T>Complex<T> Complex<T>::complex_mul(Complex<T> &c1){    Complex<T> c;    c.real=real*c1.real-(imag*c1.imag);    c.imag=real*c1.imag+imag*c1.real;    return c;}template <class T>Complex<T> Complex<T>::complex_div(Complex<T> &c1){    Complex<T> c;    c1.imag=-c1.imag;    c=complex_mul(c1);    T x;    x=c1.real*c1.real+c1.imag*c1.imag;    c.real/=x;    c.imag/=x;    return c;}template <class T>void Complex<T>::display(){    if(imag>=0)        cout<<real<<'+'<<imag<<'i'<<endl;    else        cout<<real<<imag<<'i'<<endl;}int main( ){    Complex<int> c1(3,4),c2(5,-10),c3;   //实部和虚部是int型    c3=c1.complex_add(c2);    cout<<"c1+c2=";    c3.display( );    Complex<double> c4(3.1,4.4),c5(5.34,-10.21),c6; //实部和虚部是double型    c6=c4.complex_add(c5);    cout<<"c4+c5=";    c6.display();    Complex<int> c7(2,-5),c8(-2,3),c9;    c9=c7.complex_mul(c8);    cout<<"c7*c8=";    c9.display();    Complex<double> c10(3,-1),c11(2,-2),c12;    c12=c10.complex_div(c11);    cout<<"c10 / c11=";    c12.display();    return 0;}

运行结果：

学习小结：

对类模版应该是了解了一些把，原来以为蛮简单的，写的时候其实要注意挺多的。

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