What does pop mean in C language?

In C language, the pop function is used to remove the top element of the stack and return its value. The specific steps are as follows: Create a pointer variable stack that points to the stack. To push elements onto the stack, use the push function. Call the pop function, remove the top element of the stack and return its value, stored in a pointer variable.

The meaning of pop in C language

In C language, pop is a function used to Removes and returns the top element from the stack.

Stack Overview

A stack is a data structure in which elements are stored in last-in-first-out (LIFO) order. This means that the last element added to the stack will be the first to be removed.

pop function

The pop function removes and returns the top element from the stack. If the stack is empty, the pop function returns an error code.

Function prototype

<code class="c">void *pop(void **stack);</code>

Among them:

• stack: pointer to the stack

Usage Example

The following code example demonstrates how to use the pop function:

<code class="c">#include <stdio.h>
#include <stdlib.h>

int main() {
    // 创建一个栈
    void *stack = malloc(sizeof(int) * 10);

    // 向栈中压入几个元素
    int a = 1;
    int b = 2;
    int c = 3;
    push(stack, &a);
    push(stack, &b);
    push(stack, &c);

    // 从栈中弹出最上面的元素
    int *top = pop(stack);

    // 打印弹出的元素
    printf("弹出的元素：%d\n", *top);

    return 0;
}</code>

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