定义一个复数类Complex,重载运算符“+”、“-”、“*”、“/”,使之能用于复数的加、减、乘、除。要求:将“+”和“-”的运算符重载函数做为Complex的成员函数;将“*”和“/” 的运算符重载函数做为友元函数。编写程序,分别求两个复数之和、差、积、商。
提示:若已知c1=a+bi,c2=c+di,则:
c1+c2=(a+c)+(b+d)i
c1-c2=(a-c)+(b-d)i
c1*c2=(ac-bd)+(ad+bc)i
c1/c2=(ac+bd)/(c*c+d*d)+((bc-ad)/( c*c+d*d))i
运行结果参考以下: ios
下面是代码函数
#include <iostream> using namespace std; class Complex { public : Complex (double x=0,double y=0):real(x),imag(y) {} friend Complex operator * (Complex &c1,Complex &c2); friend Complex operator / (Complex &c1,Complex &c2); Complex operator + (Complex &c2 ); Complex operator - (Complex &c2 ); void display(); private : double real; double imag; }; Complex operator * (Complex &c1,Complex &c2) { return Complex (c1.real*c2.real-c1.imag*c2.imag,c1.real*c2.imag+c1.imag*c2.real); } Complex operator / (Complex &c1,Complex &c2) { Complex c; c.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag); c.imag=(c1.imag*c2.real-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag); return c; } Complex Complex ::operator + (Complex &c2) { return Complex (real+c2.real,imag+c2.imag); } Complex Complex ::operator - (Complex &c2) { return Complex (real-c2.real,imag-c2.imag); } void Complex ::display() { cout<<"<"<<real<<","<<imag<<"i>"<<endl; } int main() { Complex c1(3,4),c2(5,-10),c3; c1.display(); c2.display(); c3=c1+c2; c3.display(); c3=c1-c2; c3.display(); c3=c1*c2; c3.display(); c3=c1/c2; c3.display(); return 0; }
出现过的问题,this
1.spa
Complex (double x=0,double y=0):real(x),imag(y){} 指针
参数初始化表这里须要对x,y赋初值,否则c3在编译时会报错;code
2.blog
must take either zero or one argumentit
出现这个问题也困扰了我好久io
二元运算符用成员重载时, 只须要一个参数, 另外一个参数由this指针传入 (第一个参数由this指针自动传入到函数中去的.)编译
Complex operator + (Complex &c1,Complex &c2 );
因此这样写是不对的