The input and output operators are reloaded to implement the input and output of plural numbers.

Program code:

# Include
 
  
Using namespace std; class Complex {public: Complex () // defines the default constructor initialization plural {real = 0; imag = 0 ;} // use the initialization table to initialize the Complex (double r, double I): real (r), imag (I) {} Complex operator + (Complex & c2 ); // Complex addition Complex operator-(Complex & c2); // Complex subtraction Complex operator * (Complex & c2 ); // multiplication of Complex numbers Complex operator/(Complex & c2); // division of Complex numbers // heavy load <
  <运算符实现输出复数 friend ostream& operator <<(ostream& output, complex& c); 重载>
   
> The operator implements the input plural friend istream & operator> (istream & input, Complex & c); private: double real; // The real-part double imag of the plural number; // imaginary part of the plural number}; // addition of the plural number Complex: operator + (Complex & c2) {Complex c3; c3.real = real + c2.real; c3.imag = imag + c2.imag; return c3;} // Complex subtraction Complex: operator-(Complex & c2) {Complex c3; c3.real = real-c2.real; c3.imag = imag-c2.imag; return c3 ;} // multiplication of Complex numbers Complex: operator * (Comp Lex & c2) {Complex c3; c3.real = real * c2.real-imag * c2.imag; c3.imag = real * c2.imag + imag * c2.real; return c3;} // division of Complex numbers Complex:: operator/(Complex & c2) {Complex c3; c3.real = (real * c2.real + imag * c2.imag)/(c2.real * c2.real + c2.imag * c2.imag ); c3.imag = (imag * c2.real-real * c2.imag)/(c2.real * c2.real + c2.imag * c2.imag); return c3 ;} // overload> operator to implement the input of the plural istream & operator> (istream & Input, Complex & c) {int a, B; char sign, I; do {cout <"enter a plural number to (a + bi or a-bi) format: "; input> a> sign> B> I;} while (! ('+' = Sign | '-' = sign) & 'I' = I); c. real = a; c. imag = ('+' = sign )? B:-B; return input;} // overload <
   <运算符实现输出复数ostream& operator <<(ostream& output, complex& c){ int num="c.imag;" if(num>
    
0) {output <
    
     
> C1; cout <"enter a plural number:"; cin> c2; // print the first plural cout <"c1 ="; cout <
     
      


      
Execution result: