c - undefined reference to 'freeHeap'

Question

I have encountered a problem when calling my freeHeap function inside of sortComp.c

I am calling it as such

heapRef myHeap = buildHeap(numData, heapSort, numData);     

freeHeap(myHeap);

When compiling I recieve the error "Undefined reference to 'freeHeap'"

I am including heap.h and inside of heap.h i have declared freeHeap

void freeHeap(heapRef *);

I am compiling it as such

gcc -o sortComp sortComp.c insertionSort.c heap.c insertionSort.h heap.h

It is defined in heap.c as

void freeHeap(heapRef *pH){
   heapRef H = *pH;
   free(H->data);
   free(H);
}

FIXED:

I changed the calling of freeHeap(myHeap);

to

freeHeap(&myHeap);

and it stopped complaining

score 0 · Accepted Answer

在你的函数声明中使用freeHeap()它heap.h：

  extern void freeHeap(heapRef*);

编辑耶稣基督，你的论点freeHeap()与原型不匹配，就像你的声明与你的定义不匹配一样。所以你的论点需要是类型heapRef*而不是。heapRef在你的程序myHeap是类型heapRef，而你应该通过heapRef*。用这个：

freeHeap(&myHeap);

score 0 · Accepted Answer

请从您的编译命令中取出 .h 文件。应该是：

gcc -o sortComp sortComp.c insertionSort.c heap.c

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