编译器/链接器错误

我正在尝试使我的程序起作用（与以前的程序不同），而我仍然会收到一些编译器/链接器错误，我不知道如何解决，任何人都可以指导我一些解决方案修复链接器/编译器或其他内容？

这是构建日志IM获取：

-------------- Build: Debug in lab1hwfinal (compiler: GNU GCC Compiler)---------------
mingw32-g++.exe -Wall -fexceptions -g -I..Documents -c   
C:UsersDekkillerDocumentslab1hwfinalmain.cpp -o objDebuglab1hwfinalmain.o
C:UsersDekkillerDocumentslab1hwfinalmain.cpp: In function 'int main()':
C:UsersDekkillerDocumentslab1hwfinalmain.cpp:19:5: error: 'complexType' was not
declared in this scope
 complexType sum;
 ^
C:UsersDekkillerDocumentslab1hwfinalmain.cpp:19:17: error: expected ';' before 
'sum'
 complexType sum;
             ^
C:UsersDekkillerDocumentslab1hwfinalmain.cpp:26:15: error: 'exit' was not declared 
in this scope
     exit(1);
           ^
C:UsersDekkillerDocumentslab1hwfinalmain.cpp:45:38: error: 'atof' was not declared
in this scope
     realpart= atof(strone.c_str());
                                  ^
C:UsersDekkillerDocumentslab1hwfinalmain.cpp:48:21: error: expected ';' before 
'outpobj'
     complexType outpobj(realpart, imaginarypart);
                 ^
C:UsersDekkillerDocumentslab1hwfinalmain.cpp:51:54: error: 'outpobj' was not 
declared in this scope
     outputfile << "Object " << counter << "-" << outpobj << endl;
                                                  ^
Process terminated with status 1 (0 minute(s), 0 second(s))
6 error(s), 0 warning(s) (0 minute(s), 0 second(s))

这是我的主要文件：

#include "Complex.h"
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
using namespace std;
int main()
{
ofstream outputfile;
ifstream inputfile;
string str;
double realpart;
double imaginarypart;
int symbol;
char ch;
string strone;
string strtwo;
complexType sum;
int counter = 0;
inputfile.open("complex.txt");
if(inputfile.fail())
{
    cout << "File opening failed." << endl;
    exit(1);
}
outputfile.open("complexObj.txt");
inputfile >> str;
while(inputfile)
{
    symbol=str.find("+");
    ch = '+';
    if(symbol < 0)
    {
        symbol = str.find("-");
        ch = '-';
    }
    stringstream streamin(str);
    getline(streamin, strone, ch);
    getline(streamin, strtwo, 'i');
    realpart= atof(strone.c_str());
    imaginarypart= atof(strtwo.c_str());
    complexType outpobj(realpart, imaginarypart);
    counter++;
    outputfile << "Object " << counter << "-" << outpobj << endl;
    inputfile.close();
    outputfile.close();
    return 0;
}
}

我的标题类文件：

#ifndef COMPLEX_H
#define COMPLEX_H
#include <iostream>

class complexType
{
friend std::ostream& operator<<(std::ostream& os, const complexType& obj);
public:
  complexType();
  complexType(double r, double i);
  complexType operator+(const complexType& objtwo);
private:
    double real;
    double imagine;
};
#endif // COMPLEX_H

这是我的类CPP文件：

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

complexType::complexType()
{
real=0;
imagine=0;
}
complexType::complexType(double r, double i)
{
real=r;
imagine=i;
}
ostream& operator<<(ostream& os, const complexType& obj)
{
os << obj.real << "," << obj.imagine;
return os;
}
complexType complexType::operator+(const complexType& objtwo)
{
complexType sum;
sum.real = real + objtwo.real;
sum.imagine = imagine + objtwo.imagine;
return sum;
}

我很抱歉问了这样的类似问题，但我无法弄清楚我的链接器或编译器有什么问题。