c语言编程代码，以菜单选择的形式，实现栈的创建，入队，出队，退出等功能

好的，这是一个关于栈的数据结构的问题，我可以回答。下面是一份示例代码，它包含了栈的创建、入栈、出栈和退出等功能。

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

#define MAX_STACK_SIZE 100

typedef struct {
    int data[MAX_STACK_SIZE];
    int top;
} Stack;

Stack* createStack()
{
    Stack* s = (Stack*) malloc(sizeof(Stack));
    s->top = -1;
    return s;
}

int isEmpty(Stack* s)
{
    return s->top == -1;
}

int isFull(Stack* s)
{
    return s->top == MAX_STACK_SIZE - 1;
}

void push(Stack* s, int x)
{
    if (isFull(s)) {
        printf("Error: stack is full\n");
        return;
    }
    s->top++;
    s->data[s->top] = x;
}

int pop(Stack* s)
{
    if (isEmpty(s)) {
        printf("Error: stack is empty\n");
        return -1;
    }
    int x = s->data[s->top];
    s->top--;
    return x;
}

void printStack(Stack* s)
{
    printf("Stack contents:");
    for (int i = s->top; i >= 0; i--) {
        printf(" %d", s->data[i]);
    }
    printf("\n");
}

void freeStack(Stack* s)
{
    free(s);
}

int main()
{
    Stack* s = createStack();

    int choice, x;

    do {
        printf("Menu:\n");
        printf("1. Push\n");
        printf("2. Pop\n");
        printf("3. Print stack\n");
        printf("4. Quit\n");
        printf("Enter choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                printf("Enter value to push: ");
                scanf("%d", &x);
                push(s, x);
                break;
            case 2:
                x = pop(s);
                if (x != -1) {
                    printf("Popped value: %d\n", x);
                }
                break;
            case 3:
                printStack(s);
                break;
            case 4:
                // Quit
                break;
            default:
                printf("Invalid choice\n");
                break;
        }
    } while (choice != 4);

    freeStack(s);
    return 0;
}

希望这个代码能够帮到你！