Question

嘿伙计们我是c +的新手，每次编译我的代码时都会说我在一个很好的行上有一个errorc2413，但我显然有一个半冒号。每当我输入ex等内容时，通常会发生这种情况。 Complex.real。我想知道你是否可以帮助我？

using namespace std;
#include <iostream>

class Complex
{ 
private:
        double real;
      double imaginary;
public:
Complex()
{
    real = 0.0;
    imaginary = 0.0;
}
Complex(double r, double i)
{
    real = r;
    imaginary= i;
}

//Setters
void setReal(double r)
{
    real = r;
}
void setImaginary(double i)
{
    imaginary = i;
}

//Getters
double getReal()
{
    return real;
}// end getReal
double getImaginary()
{
    return imaginary;
}//end of getImaginary()

void output()
{
    cout<< real <<" + i"<< imaginary; 
}

Complex add(Complex a)
{
    Complex result;
    result.real= a.real + real;
    result.imaginary = a.imaginary+imaginary;
    return result;

}
Complex subtract(Complex a)
{
    Complex result;
    Complex.real = (real - a.real);
    Complex.imaginary = (imaginary - a.imaginary);
    return result;
}
Complex mul(Complex a)
{
    Complex result;
    Complex.real = (real*a.real)-(imaginary*a.imaginary);
    Complex.imaginary = (real*a.imaginary)+(imaginary*a.real);
    return result;
}
Complex div(Complex a)
{
    Complex result;
    result.real = 
    ((real*a.real)+(imaginary*a.imaginary))/((a.real*a.real)+(a.imaginary+a.imaginary));
    result.imaginary = 
        ((imaginary*a.real)-(real*a.imaginary))/((a.real*a.real)+(a.imaginary+a.imaginary));
    return result;
}
}//end complex class

1＆gt; ------构建开始：项目：复数计算器，配置：调试Win32 ------ 1 GT; Calculator.cpp 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ calculator.cpp（3）：error C2143：syntax error：missing';'在'使用'之前 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ complex.h（57）：error C2143：syntax error：missing';'在'。'之前 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ complex.h（57）：error C2143：syntax error：missing';'在'。'之前 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ complex.h（58）：error C2143：syntax error：missing';'在'。'之前 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ complex.h（58）：error C2143：syntax error：missing';'在'。'之前 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ complex.h（64）：error C2143：syntax error：missing';'在'。'之前 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ complex.h（64）：error C2143：syntax error：missing';'在'。'之前 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ complex.h（65）：error C2143：syntax error：missing';'在'。'之前 1＆gt; c：\ users \ victor \ documents \ visual studio 2010 \ projects \ complex number calculator \ complex number calculator \ complex.h（65）：error C2143：syntax error：missing';'在'。'之前 ==========构建：0成功，1个失败，0个最新，0个跳过==========

Answer 1

所以有一些错误，一个类定义的结尾需要一个;。您似乎在几个地方Complex代替result，例如：

Complex mul(Complex a)
{
    Complex result;
    Complex.real = (real*a.real)-(imaginary*a.imaginary);
    Complex.imaginary = (real*a.imaginary)+(imaginary*a.real);
    return result;
}

看起来应该是：

Complex mul(Complex a)
{
    Complex result;
    result.real = (real*a.real)-(imaginary*a.imaginary);
    result.imaginary = (real*a.imaginary)+(imaginary*a.real);
    return result;
}

一旦我解决了上述问题，它看起来好像编译好了。函数subtract也与mul具有相同的问题。还建议在你的getter上使用const，例如：

double getReal() const
{                ^^^^^
    return real;
}

对于您知道永远不会改变任何对象变量的方法，这是一种很好的做法。

复数简单错误

1 个答案: