非递归方式实现二叉树的中序遍历，给出一个完整的具体c语言编程代码

以下是使用非递归方式实现二叉树的中序遍历的C语言代码：

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

// 二叉树结构体
typedef struct TreeNode {
    int val;
    struct TreeNode* left;
    struct TreeNode* right;
} TreeNode;

// 栈结构体
typedef struct Stack {
    int top;
    int capacity;
    TreeNode** array;
} Stack;

// 创建一个栈
Stack* createStack(int capacity) {
    Stack* stack = (Stack*)malloc(sizeof(Stack));
    stack->top = -1;
    stack->capacity = capacity;
    stack->array = (TreeNode**)malloc(stack->capacity * sizeof(TreeNode*));
    return stack;
}

// 判断栈是否为空
int isEmpty(Stack* stack) {
    return stack->top == -1;
}

// 判断栈是否已满
int isFull(Stack* stack) {
    return stack->top == stack->capacity - 1;
}

// 入栈
void push(Stack* stack, TreeNode* item) {
    if (isFull(stack)) {
        return;
    }
    stack->array[++stack->top] = item;
}

// 出栈
TreeNode* pop(Stack* stack) {
    if (isEmpty(stack)) {
        return NULL;
    }
    return stack->array[stack->top--];
}

// 中序遍历二叉树
void inorderTraversal(TreeNode* root) {
    if (root == NULL) {
        return;
    }

    Stack* stack = createStack(100);  // 创建一个栈，容量为100
    TreeNode* curr = root;

    while (curr != NULL || !isEmpty(stack)) {
        // 将当前节点的所有左子节点入栈
        while (curr != NULL) {
            push(stack, curr);
            curr = curr->left;
        }

        // 弹出栈顶元素并访问它
        curr = pop(stack);
        printf("%d ", curr->val);

        // 处理右子节点
        curr = curr->right;
    }

    free(stack);
}

// 创建一个二叉树
TreeNode* createTree() {
    TreeNode* root = (TreeNode*)malloc(sizeof(TreeNode));
    TreeNode* node1 = (TreeNode*)malloc(sizeof(TreeNode));
    TreeNode* node2 = (TreeNode*)malloc(sizeof(TreeNode));
    TreeNode* node3 = (TreeNode*)malloc(sizeof(TreeNode));
    TreeNode* node4 = (TreeNode*)malloc(sizeof(TreeNode));
    TreeNode* node5 = (TreeNode*)malloc(sizeof(TreeNode));

    root->val = 1;
    node1->val = 2;
    node2->val = 3;
    node3->val = 4;
    node4->val = 5;
    node5->val = 6;

    root->left = node1;
    root->right = node2;
    node1->left = node3;
    node1->right = node4;
    node2->left = NULL;
    node2->right = node5;
    node3->left = NULL;
    node3->right = NULL;
    node4->left = NULL;
    node4->right = NULL;
    node5->left = NULL;
    node5->right = NULL;

    return root;
}

int main() {
    TreeNode* root = createTree();
    inorderTraversal(root);
    return 0;
}

该代码中使用了一个栈来辅助进行中序遍历。首先将根节点入栈，然后将所有左子节点入栈，再弹出栈顶元素并访问它。最后处理右子节点。重复以上步骤直到栈为空。