C++ 为什么这个总是提示错误啊...........

Question

//Complex.h

#ifndef COMPLEX_H
#define COMPLEX_H

class Complex
{
public:
Complex( double = 0.0, double = 0.0 );
Complex add( const Complex & );
Complex subtract( const Complex & );
void printComplex();
void setComplexNumber( double, double );
private:
double realPart;
double imaginaryPart;
};
#endif

//Complex.cpp
//Member-function definitions for class Complex.

#include <iostream>
using std::cout;
#include "Complex.h"

Complex::Complex( double real, double imaginary )
{
setComplexNumber( real, imaginary );
}

Complex Complex::add( const Complex &right )
{
return Complex(realPart + right.realPart, imaginaryPart + right.imaginaryPart );
}

Complex Complex::subtract( const Complex &right )
{
return Complex(realPart - right.realPart, imaginaryPart - right.imaginaryPart );
}

void Complex::printComplex()
{
cout << '(' << realPart << ", " << imaginaryPart << ')';
}

void Complex::setComplexNumber( double rp, double ip )
{
realPart = rp;
imaginaryPart = ip;
}

// 9.5
#include <iostream>
using std::cout;
using std::endl;
#include "Complex.h"

int main()
{
Complex a( 1, 7 ), b( 9, 2 ), c;

a.printComplex();
cout << " + ";
b.printComplex();
cout << " = ";
c = a.add( b );
c.printComplex();

cout << '\n';

a.setComplexNumber( 10, 1 );
b.setComplexNumber( 11, 5 );

a.printComplex();
cout << " - ";
b.printComplex();
cout << " = ";
c = a.subtract( b );
c.printComplex();
cout << endl;

return 0;
}
我是说。。为什么运行不了啊....

Answer 1

你用的编程工具应该是VS吧，在main 的return语句前，加上
system("pause");
你就会看到输入结果了。
它的作用是，在你的程序运行结束后，控制台窗口并不会直接自动关闭，而是等待你的
press any enter。

Answer 2

该程序没问题，输出结果如下：
(1, 7) + (9, 2) = (10, 9)
(10, 1) - (11, 5) = (-1, -4)

Terminated with return code 0
Press any key to continue ...

Answer 3

可以运行啊。