如何解决此C代码中的运行时错误？

我正在尝试编写代码来描述堆栈的所有基本操作，但是一旦编译并运行它，我就会开始编写代码。它立即停止工作。

我的IDE（CodeBlocks）中没有编译错误。我怎么知道我的代码中有什么错误？

我还可以以某种方式更改CodeBlocks中的设置以显示此类运行时错误吗？

我下面的代码有什么错误？是否一个接一个地使用箭头运算符（->）？谢谢你。

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

typedef struct node
{
    int data;
    struct node *prev;
}node;

typedef struct stack
{
    node *top;
}stack;

int count=0;

void push(stack *x, int num)
{
    node *temp;
    if(x->top == NULL)
    {
        temp=(node *)malloc(sizeof(node *));
        temp->data=num;
        temp->prev=NULL;
        x->top=temp;
    }
    else
    {
        temp=(node *)malloc(sizeof(node *));
        temp->data=num;
        temp->prev=x->top;
        x->top=temp;
    }
    count++;
    return;
}

int pop(stack *x)
{
    node *temp;
    int m;
    if(x->top == NULL)
    {
        printf("Error:The stack is empty\n");
        return;
    }
    else
    {
        m=(x->top)->data;
        temp=(x->top)->prev;
        x->top=temp;
    }
    count--;
    return m;
}
int main()
{
    int k=1, n, num;
    stack *myStack;
    myStack->top = NULL;
    while(k)
    {
        printf("Enter the operation you want to perform\n");
        printf("1.PUSH\n");
        printf("2.POP\n");
        printf("3.TOP\n");
        printf("4.STACK COUNT\n");
        scanf("%d", &n);
        switch(n)
        {
            case 1:
                printf("Enter the number you want to push to the stack\n");
                scanf("%d", &num);
                push(myStack, num);
                break;
            case 2:
                printf("The popped element is %d\n", pop(myStack));
                break;
            case 3:
                printf("The topmost element of the stack is %d\n", (myStack->top)->data);
                break;
            case 4:
                printf("The number of elements in the stack are %d\n", count);
                break;
            default:
                printf("Invalid request\n");
                break;
        }
        printf("Do you wish to perform another operation?(1/0)");
        scanf("%d", &k);
    }
    return 0;
}