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我想在C++中做一个简单的边界检查数组。我已经在头文件中声明了一个类，并在一个单独的源文件中定义了这个类。编译步骤运行正常，但是当我尝试将对象链接，我得到以下错误：未定义的参考错误在C++链接步骤
$ g++.exe -o a.exe src\main.o src\array.o
src\main.o: In function `main':
../src/main.cpp:7: undefined reference to `Array<int>::Array(int)'
../src/main.cpp:9: undefined reference to `Array<int>::operator[](int)'
../src/main.cpp:10: undefined reference t o `Array<int>::operator[](int)'
../src/main.cpp:11: undefined reference t o `Array<int>::operator[](int)'
../src/main.cpp:13: undefined reference t o `Array<int>::operator[](int)'
../src/main.cpp:7: undefined reference to `Array<int>::~Array()'
../src/main.cpp:7: undefined reference to `Array<int>::~Array()'
collect2.exe: error: ld returned 1 exit status
的main.cpp
#include <iostream>
#include "array.hpp"
using namespace std;
int main() {
Array<int> x(10); // compiler error
x[0] = 1; // compiler error
x[1] = 2; // compiler error
x[2] = 3; // compiler error
cout << x[1] << endl; // compiler error
return 0;
}
array.hpp
#ifndef ARRAY_HPP_
#define ARRAY_HPP_
template <class T>
class Array{
private:
T* array;
int length_;
public:
Array(int);
~Array();
int Length();
int& operator[](int);
};
#endif /* ARRAY_HPP_ */
阵列。 cpp
#include "array.hpp"
template <class T>
Array<T>::Array(int size) {
length_ = size;
array = new T[size];
}
template <class T>
Array<T>::~Array() {
delete[] array;
}
template <class T>
int Array<T>::Length() {
return length_;
}
template <class T>
int& Array<T>::operator[](const int index) {
if (index < 0 || index >= length_) {
throw 100;
}
return array[index];
}