Free double pointer struct












1















I want to put all MinHeapNode's into an array and free them after the program is done printing them.



Here is the code that creates the array and frees it:



void HuffmanCodes(int data, int freq, int size) {
struct MinHeap *clear;
int s = 0;
struct MinHeapNode *nodes = malloc(sizeof(struct MinHeapNode) * ((4 * 2) - 1));
struct MinHeapNode *root = buildHuffmanTree(data, freq, size, &clear);
int arr[MAX_TREE_HT], top = 0;
printCodes(root, arr, top, &nodes, &s);
int i;
for (i = 0; i < s; i++) {
free(nodes[i]);
}
free(nodes);
free(clear->array);
free(clear);
}


Here is the code that grabs each MinHeapNode and puts it into nodes



void printCodes(struct MinHeapNode *root, int arr, int top, struct MinHeapNode **nodes, int *s) {
if (root->left) {
arr[top] = 0;
printCodes(root->left, arr, top + 1, nodes, s);
}
if (root->right) {
arr[top] = 1;
printCodes(root->right, arr, top + 1, nodes, s);
}
if (isLeaf(root)) {
printf("%d: ", root->data);
printArr(arr, top);
}
nodes[*s] = root;
*s++;
}


Replacing the last two lines of printCodes with "free(root);" works, but I'm wanting to free it outside of the function.










share|improve this question



























    1















    I want to put all MinHeapNode's into an array and free them after the program is done printing them.



    Here is the code that creates the array and frees it:



    void HuffmanCodes(int data, int freq, int size) {
    struct MinHeap *clear;
    int s = 0;
    struct MinHeapNode *nodes = malloc(sizeof(struct MinHeapNode) * ((4 * 2) - 1));
    struct MinHeapNode *root = buildHuffmanTree(data, freq, size, &clear);
    int arr[MAX_TREE_HT], top = 0;
    printCodes(root, arr, top, &nodes, &s);
    int i;
    for (i = 0; i < s; i++) {
    free(nodes[i]);
    }
    free(nodes);
    free(clear->array);
    free(clear);
    }


    Here is the code that grabs each MinHeapNode and puts it into nodes



    void printCodes(struct MinHeapNode *root, int arr, int top, struct MinHeapNode **nodes, int *s) {
    if (root->left) {
    arr[top] = 0;
    printCodes(root->left, arr, top + 1, nodes, s);
    }
    if (root->right) {
    arr[top] = 1;
    printCodes(root->right, arr, top + 1, nodes, s);
    }
    if (isLeaf(root)) {
    printf("%d: ", root->data);
    printArr(arr, top);
    }
    nodes[*s] = root;
    *s++;
    }


    Replacing the last two lines of printCodes with "free(root);" works, but I'm wanting to free it outside of the function.










    share|improve this question

























      1












      1








      1








      I want to put all MinHeapNode's into an array and free them after the program is done printing them.



      Here is the code that creates the array and frees it:



      void HuffmanCodes(int data, int freq, int size) {
      struct MinHeap *clear;
      int s = 0;
      struct MinHeapNode *nodes = malloc(sizeof(struct MinHeapNode) * ((4 * 2) - 1));
      struct MinHeapNode *root = buildHuffmanTree(data, freq, size, &clear);
      int arr[MAX_TREE_HT], top = 0;
      printCodes(root, arr, top, &nodes, &s);
      int i;
      for (i = 0; i < s; i++) {
      free(nodes[i]);
      }
      free(nodes);
      free(clear->array);
      free(clear);
      }


      Here is the code that grabs each MinHeapNode and puts it into nodes



      void printCodes(struct MinHeapNode *root, int arr, int top, struct MinHeapNode **nodes, int *s) {
      if (root->left) {
      arr[top] = 0;
      printCodes(root->left, arr, top + 1, nodes, s);
      }
      if (root->right) {
      arr[top] = 1;
      printCodes(root->right, arr, top + 1, nodes, s);
      }
      if (isLeaf(root)) {
      printf("%d: ", root->data);
      printArr(arr, top);
      }
      nodes[*s] = root;
      *s++;
      }


      Replacing the last two lines of printCodes with "free(root);" works, but I'm wanting to free it outside of the function.










      share|improve this question














      I want to put all MinHeapNode's into an array and free them after the program is done printing them.



      Here is the code that creates the array and frees it:



      void HuffmanCodes(int data, int freq, int size) {
      struct MinHeap *clear;
      int s = 0;
      struct MinHeapNode *nodes = malloc(sizeof(struct MinHeapNode) * ((4 * 2) - 1));
      struct MinHeapNode *root = buildHuffmanTree(data, freq, size, &clear);
      int arr[MAX_TREE_HT], top = 0;
      printCodes(root, arr, top, &nodes, &s);
      int i;
      for (i = 0; i < s; i++) {
      free(nodes[i]);
      }
      free(nodes);
      free(clear->array);
      free(clear);
      }


      Here is the code that grabs each MinHeapNode and puts it into nodes



      void printCodes(struct MinHeapNode *root, int arr, int top, struct MinHeapNode **nodes, int *s) {
      if (root->left) {
      arr[top] = 0;
      printCodes(root->left, arr, top + 1, nodes, s);
      }
      if (root->right) {
      arr[top] = 1;
      printCodes(root->right, arr, top + 1, nodes, s);
      }
      if (isLeaf(root)) {
      printf("%d: ", root->data);
      printArr(arr, top);
      }
      nodes[*s] = root;
      *s++;
      }


      Replacing the last two lines of printCodes with "free(root);" works, but I'm wanting to free it outside of the function.







      c arrays struct malloc free






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 19 '18 at 4:09









      Garrett EwensGarrett Ewens

      132




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