这么多错误？？？？？？

一世豪杰

这是头文件：
#include <iostream>
using namespace std;
#ifndef COMPLEX0_H_
#define COMPLEX0_H_
class complex
{
private:
double real;
double imaginary;
public:
complex(double r=0.0,double i=0.0);
complex opreator+(const complex & c)const;
complex opreator*(const complex & c)const;
friend complex opreator*(double x,const compelx & c );
}
#endif
下面是成员函数的实现文件：

#include <iostream>
using namespace std;
#include "complex0.h"
complex::complex(double r=0.0,double i=0.0)
{
real=r;
imaginary=i;
}
complex complex::opreator+(const complex &c)const
{
return complex(real+c.real,imaginary+c.imaginary);
}
complex complex::opreator*(double x)const
{
return complex(real*x,imaginary*x);
}
complex opreator*(double x,const complex &c)
{
return c*x;
}

这只是一部分功能，就编译这些错误就一大堆，比如：
:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(12) : error C2143: syntax error : missing ';' before '+'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(12) : error C2460: 'opreator' : uses 'complex', which is being defined
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(6) : see declaration of 'complex'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(12) : error C2059: syntax error : '+'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(12) : error C2238: unexpected token(s) preceding ';'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(15) : error C2143: syntax error : missing ';' before '*'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(15) : error C2460: 'opreator' : uses 'complex', which is being defined
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(6) : see declaration of 'complex'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(15) : error C2086: 'opreator' : redefinition
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(15) : error C2062: type 'double' unexpected
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(15) : error C2238: unexpected token(s) preceding ';'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(16) : error C2143: syntax error : missing ';' before '*'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(16) : error C2460: 'opreator' : uses 'complex', which is being defined
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(6) : see declaration of 'complex'
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(16) : error C2433: 'opreator' : 'friend' not permitted on data declarations
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(16) : error C2244: 'opreator' : unable to resolve function overload
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(16) : error C2062: type 'double' unexpected
d:\vc++ 6.0\msdev98\myprojects\my c plus\类\complex0.h(16) : error C2238: unexpected token(s) preceding ';'
D:\VC++ 6.0\MSDev98\MyProjects\My C Plus\类\complex0.cpp(5) : error C2533: 'complex::complex' : constructors not allowed a return type
D:\VC++ 6.0\MS