Re: [問題] c++實作複數的class

看板C_and_CPP (C/C++)作者TheJim (TheJim)時間16年前 (2009/05/04 16:23)推噓6(6推 0噓 4→)

留言10則, 4人參與討論串2/2 (看更多)

#include <iostream> #include <iomanip> using namespace std; class Complex { private: double RealPart; double ImaginPart; public: Complex operator +(const Complex & ); Complex operator *(const Complex &); Complex operator /(const Complex &); friend Complex operator *( double , const Complex &a); Complex operator -(); Complex(const double a = 0.0, const double b = 0.0):RealPart(a),ImaginPart(b) {} ~Complex() {} friend Complex operator -(const Complex &, const Complex &); friend std::ostream & operator << (std::ostream & os ,const Complex &); friend std::istream & operator >> (std::istream & is,Complex &); }; Complex Complex::operator +(const Complex &t) { return Complex(RealPart+t.RealPart , ImaginPart+t.ImaginPart ); } Complex operator -(const Complex &a, const Complex &b) { return Complex(a.RealPart -b.RealPart , a.ImaginPart -b.ImaginPart ); } Complex Complex::operator *(const Complex &t) { return Complex(RealPart*t.RealPart -ImaginPart*t.ImaginPart , RealPart*t.ImaginPart +ImaginPart*t.RealPart ); } Complex Complex::operator /(const Complex &t) { double x = t.RealPart*t.RealPart + t.ImaginPart*t.ImaginPart; if( x!=0 ) { //cout<<Complex( (RealPart*t.RealPart +ImaginPart*t.ImaginPart)/x , (ImaginPart*t.RealPart-RealPart*t.ImaginPart)/x ); return Complex( (RealPart*t.RealPart +ImaginPart*t.ImaginPart)/x , (ImaginPart*t.RealPart-RealPart*t.ImaginPart)/x ); } //cout<<"divided by 0!\n"; return Complex(-0.001,0.001); } Complex operator *( double n, const Complex &t) { return Complex(n*t.RealPart ,n*t.ImaginPart ); } Complex Complex::operator -() { return Complex(-RealPart, -ImaginPart); } std:: ostream & operator << (std:: ostream & os, const Complex & t) { if( t.RealPart==-0.001&&t.ImaginPart==0.001 ) cout<<"divided by 0!\n"; else if( t.RealPart==0.001&&t.ImaginPart==-0.001 ) cout<<"undefined operation!\n"; else os <<"("<< fixed << setprecision(2)<< t.RealPart << ","<<t.ImaginPart <<")\n"; return os; } std:: istream & operator >> (std:: istream & is, Complex &t ) { char a; cin>>a; is >> t.RealPart ; cin>>a; is >> t.ImaginPart ; cin>>a; return is; } int main() { char oper; Complex* answer[1000]; Complex num1,num2; int i=0; while( cin>>num1 ){ answer[i] = new Complex; cin>>oper; cin>>num2; switch( oper ){ case '+': //cout<<num1+num2; //cin>>num2; *answer[i]=num1+num2; break; case '-': //cout<<num1-num2; //cin>>num2; *answer[i]=num1-num2; break; case '*': //cout<<num1*num2; //cin>>num2; *answer[i]=num1*num2; break; case '/': //num1/num2; //cin>>num2; *answer[i]=num1/num2; break; default: *answer[i]=Complex(0.001,-0.001); //cout<<"undefined operation!\n"; break; } /*if( i==10 ) break;*/ i++; } for( int j=0;j<i;j++ ) cout<<*answer[j]; system("pause"); return 0; } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.113.140.12