【例4.8】定义复数complex类,使用友元函数

【例 4.8】定义复数 Complex 类，使用友元函数，完成复数的加法、减法、 乘法运算，以及对复数的输出。 #include class Complex double real; double image; public: Complex(double r=0,double i=0) real=r; image=i; friend void inputcomplex(Complex friend Complex addcomplex(Complex c1,Complex c2); friend Complex subcomplex(Complex c1,Complex c2); friend Complex mulcomplex(Complex c1,Complex c2); friend void outputcomplex(Complex comp); ; void inputcomplex(Complex Complex addcomplex(Complex c1,Complex c2) Complex c; c.real=c1.real+c2.real; c.image=c1.image+c2.image; return c; Complex subcomplex(Complex c1,Complex c2) Complex c; c.real=c1.real-c2.real; c.image=c1.image-c2.image; return c; Complex mulcomplex(Complex c1,Complex c2) Complex c; c.real=c1.real*c2.real-c1.image*c2.image; c.image=c1.real*c2.image+c1.image*c2.real; return c; void outputcomplex(Complex comp) cout“(“comp.real“,“comp.image“)“; void main() Complex c1,c2,result; cout“请输入第一个复数的实部和虚部:“endl; inputcomplex(c1); cout“请输入第二个复数的实部和虚部:“endl; inputcomplex(c2); result=addcomplex(c1,c2); outputcomplex(c1); cout“+“; outputcomplex(c2); cout“=“; outputcomplex(result); cout“n-“endl; result=subcomplex(c1,c2); outputcomplex(c1); cout“-“; outputcomplex(c2); cout“=“; outputcomplex(result); cout“n-“endl; result=mulcomplex(c1,c2); outputcomplex(c1); cout“*“; outputcomplex(c2); cout“=“; outputcomplex(result); coutendl; 程序的运行结果为： 请输入第一个复数的实部和虚部: 1 2 请输入第二个复数的实部和虚部: 3 4 (1,2)+(3,4)=(4,6) - (1,2)-(3,4)=(-2,-2) - (1,2)*(3,4)=(-5,10) 说明： 此例中，我们通过友元函数实现了复数的加法、减法、乘法运算，以及复数的 输入和