错误 1 error LNK2001: 无法解析的外部符号 "public: __thiscall illegalParameterValue::~illega

[赵小咖]

//matrix.h
#pragma once
#include<iostream>
using namespace std;


template<class T>
class matrix
{
	friend ostream& operator<<(ostream&, const matrix<T>&);
public:
	matrix(int theRows = 0, int theColumes = 0);
	matrix(const matrix<T>&);
	~matrix(){ delete[] elements; }
	int rows(){ return theRows; }
	int columes(){ return theColumes; }
	T& operator()(int i, int j) const;
	matrix<T> operator+(const matrix<T>&) const;
	matrix<T> operator+()  const;
	matrix<T>& operator=(const matrix<T>&);
	matrix<T> operator-(const matrix<T>&) const;
	matrix<T> operator-() const;
	matrix<T> operator*(const matrix<T>&) const;
	matrix<T> operator+=(const T&);
private:
	int theRows, theColumes;
	T *elements;
};

template<class T>
ostream& operator<<(ostream& out, const matrix<T>& m)
{// Put matrix m into the stream out.
	// One row per line.
	int k = 0;  // index into element array
	for (int i = 0; i < m.theRows; i++)
	{// do row i
		for (int j = 0; j < m.theColumes; j++)
			out << m.elements[k++] << "  ";

		// row i finished
		out << endl;
	}
	return out;
}



//matrix.cpp
#include "matrix.h"
#include "illegalParameterValue.h"


template<class T>
matrix<T>::matrix(int theRows,int theColumes)
{
	if (theRows < 0 || theColumes < 0)
		throw illegalParameterValue("Row and Columes must be >=0");
	if ((theRows != 0 || theColumes != 0) && (theRows == 0 || theColumes == 0))
		throw illegalParameterValue("Either both or neither Rows and Columes should be zero");
	this->theRows = theRows;
	this->theColumes = theColumes;
	elements = new T[theRows*theColumes];
}


template<class T>
matrix<T>::matrix(const matrix<T>& m)
{
	theRows = m.theRows;
	theColumes = m.theColumes;
	elements = new T[theColumes*theRows];
	copy(m.elements, m.elements + theColumes*theRows, elements);
}


template<class T>
matrix<T>& matrix<T>::operator=(const matrix<T>& m)
{
	if (this != &m)
	{
		delete[] elements;
		theRows = m.theRows;
		theColumes = m.theColumes;
		elements = new T[theColumes*theRows];
		copy(m.elements, m.elements + theRows*theColumes, elements);
	}
	return *this;
}


template<class T>
T& matrix<T>::operator()(int i, int j) const
{
	if (i<1 || i>theRows || j > 1 || j > theColumes)
		throw matrixIndexOutOfBrounds();
	return elements[(i - 1)*theColumes + j - 1];
}



template<class T>
matrix<T> matrix<T>::operator+(const matrix<T>& m) const
{
	if (theRows != m.theRows || theColumes != m.theColumes)
		throw matrixSizeMismatch();
	matrix<T> w(theRows, theColumes);
	for (int i = 0; i < theRows*theColumes; i++)
		w.elements[i] = m.elements[i] + elements[i];
	return w;
}


template<class T>
matrix<T> matrix<T>::operator*(const matrix<T>& m) const
{
	if (theColumes != m.theRows)
		throw matrixSizeMismatch();
	matrix<T> w(theRows, m.theColumes);
	int ct = 0, cm = 0, cw = 0;
	for (int i = 1; i <= theRows; i++)
	{
		for (int j = 0; j <= theColumes; j++)
		{
			T sum = elements[ct] * m.elements[cm];
			for (int k = 0; k <= theColumes; k++)
			{
				ct++;
				cm += m.theColumes;
				sum += elements[ct] * m.elements[cm];
			}
			w.elements[cw++] = sum;
			ct -= theColumes - 1;
			cm = j;
		}
		ct += theColumes;
		cm = 0;
	}
	return w;
}


//main.cpp
#include<iostream>
#include<string>
#include"matrix.h"

using namespace std;

int main()
{
	matrix<int> mat(4,5);

	return 0;
}

错误如下：
错误 1 error LNK2001: 无法解析的外部符号 "public: __thiscall illegalParameterValue::~illegalParameterValue(void)" (??1illegalParameterValue@@QAE@XZ) C:\Users\zhao\Documents\Visual Studio 2013\Projects\matrix\matrix\main.obj matrix
错误 2 error LNK1120: 1 个无法解析的外部命令

[paschen]

编译器不支持对模板的分离式编译，将类模板的声明和实现放到一个文件中

[paschen]

原因：http://blog.csdn.net/pongba/article/details/19130

[真相重于对错]

模板的声明和定义，不要分为两个文件！