...未定义引用... collect2：ld返回1退出状态

Question

编译时我遇到了一些错误，我无法弄清楚为什么...我的heapsort.h应该有导出类型吗？

heapsort.c

#include <stdio.h>        // standard libraries already included in "list.h"
#include <stdlib.h>

#include "heap.h"
#include "heapsort.h"

void heapSort(int* keys, int numKeys){
   heapHndl H = NULL;
   H = buildHeap(numKeys, keys, numKeys);
   for (int i = 1; i < numKeys; i++){
      keys[i] = maxValue(H);
      deleteMax(H);
   }
   freeHeap(&H);
}

---

heapsort.h：

#ifndef _HEAPSORT_H_INCLUDE_
#define _HEAPSORT_H_INCLUDE_

#include <stdio.h>
#include <stdlib.h>

void heapSort(int* keys, int numKeys);

#endif

---

当我使用我的客户端程序编译时，我在编译时遇到此错误：

HeapClient.o: In function `main':
HeapClient.c:(.text.startup+0x1a3): undefined reference to `heapsort'"

Answer 1

C（和C ++）区分大小写。您的函数名为heapSort。您的HeapClient.c显然正在调用heapsort，因此链接器抱怨它无法在任何地方找到heapsort函数。修复拼写错误，它应该链接。