> For the complete documentation index, see [llms.txt](https://tpout.gitbook.io/workspace/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tpout.gitbook.io/workspace/c/xing-neng-si-kao.md).

# 性能思考

```c
int swap(){
//    int temp = stack[top_index];
//    top_index --;
//    return temp
    return stack[top_index --];
}

```