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XCode Linker錯誤,簡單的C ++函數

[英]XCode Linker Error, Simple C++ functions

我有一個用xcode編寫的程序,並且只有骨架可以正常運行。 我去添加一些代碼,當我添加三個函數時,它們都是私有的,其中兩個都內嵌到.h和.cpp中。 當我去編譯時,我得到了鏈接器錯誤,因為上帝知道原因。 我正在制作函數的類也繼承自一個結構,但我不認為這應該是一個問題。 病態發布下面的代碼。 (這個項目有很多東西,所以我不能發布所有內容)

#ifndef HEAP_SORT_H
#define HEAP_SORT_H

#include "Interfaces02.h"
#include "CountedInteger.h"

class HeapSort : public IHeapSort {
public:
HeapSort();
virtual ~HeapSort();
virtual void buildHeap(std::vector<CountedInteger>& vector);
virtual void sortHeap(std::vector<CountedInteger>& vector);
private:
virtual unsigned int l(int i);
virtual unsigned int r(int i);
virtual void fixDown(std::vector<CountedInteger>& vector, int p);
};

#endif


#include "HeapSort.h"
#include "CountedInteger.h"

HeapSort::HeapSort()
{
}

HeapSort::~HeapSort()
{
}

void HeapSort::buildHeap(std::vector<CountedInteger>& vector)
{    

int i = ((int) vector.size()) - 1;
for(; i > 1; i--)
{
    fixDown(vector, i);
}


}

void HeapSort::sortHeap(std::vector<CountedInteger>& vector)
{
}

inline unsigned int l(int i)
{
return ((i*2)+1);
}

inline unsigned int r(int i)
{
   return ((i*2)+2);
}

void fixDown(std::vector<CountedInteger>& vector, int p)
{

int largest;

if(l(p) <= vector.size() && vector[l(p)] > vector[p])
   {
       largest = l(p);
   }
   else
   {
       largest = p;
   }
if(r(p) <= vector.size() && vector[r(p)] > vector[p])
   {
       largest = r(p);
   }
if(largest != p)
{
    CountedInteger temp = vector[largest];
    vector[largest] = vector[p];
    vector[p] = temp;
    fixDown(vector, largest);
}


}

這是它給我的錯誤:

Undefined symbols for architecture x86_64:
"HeapSort::l(int)", referenced from:
vtable for HeapSort in HeapSort.o
  "HeapSort::r(int)", referenced from:
  vtable for HeapSort in HeapSort.o
  "HeapSort::fixDown(std::vector<CountedInteger,std::allocator<CountedInteger>>&,int)", 
 referenced from:
  vtable for HeapSort in HeapSort.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

您沒有實現:

virtual unsigned int l(int i);
virtual unsigned int r(int i);
virtual void fixDown(std::vector<CountedInteger>& vector, int p);

您忘記了在實現文件中限定這些方法。

inline unsigned int l(int i)

與...不同

inline unsigned int HeapSort::l(int i)

就像現在一樣,它們只是在該翻譯單元中定義的自由函數。

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