我是直接用控制台运行的

你的 for 循环没写开始条件或者初始值吧......

#include 
#include 
#include 

using namespace std;

int main()
{
    vector a;
    cout << "请输入：" << endl;

    int b;
    cin >> b;
    for(int i = 0; i < b; i++)
    {
        int c;
        cin >> c;
        a.push_back(c);
    }

    int max = a[0];
    for(int i = 0; i < b; i++)
    {
        if(max < a[i])
        {
            max = a[i];
        }
    }
    cout << max << endl;

    cin.get();    
    cout << endl << "Press any key to continue..." << endl;
    cin.get();
    return 0;
}

这样好像没啥问题，编译可以用 g++ -o 输出文件名 源文件路径 来指定输出文件名。

你i没赋值啊，老师该打你屁股了

你现在是用codeblock的吧，等你学会cpp一定要学习vim写cpp，vim天下第一

vim/emacs是上个世纪的东西

人生苦短，vscode吧

set nocompatible  "Turn off compatibility mode with Vi
set number "Show Line Numbers
set nowrap  "No automatic folding
set showmatch "Display matching parentheses
set encoding=utf-8
set fenc=utf-8
set ts=4
set mouse=a "To enable the mouse
set hlsearch  "Search highlight
syntax enable  "Syntax highlighting
set tabstop=4 "TAB equivalent space length
set softtabstop=4 
set expandtab 
set autoindent "Automatic indentation
set nocompatible
filetype off
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'VundleVim/Vundle.vim'
Plugin 'davidhalter/jedi-vim'
Plugin 'w0rp/ale'
Plugin 'gaalcaras/ncm-R'
Plugin 'tpope/vim-fugitive'
Plugin 'Shougo/neocomplete.vim'
Plugin 'jalvesaq/Nvim-R'
Plugin 'chrisbra/csv.vim'
Plugin 'ncm2/ncm2'
Plugin 'roxma/nvim-yarp'
Plugin 'roxma/vim-hug-neovim-rpc'
Plugin 'sirver/UltiSnips'
Plugin 'ncm2/ncm2-ultisnips'
Plugin 'Valloric/YouCompleteMe'
Plugin 'godlygeek/tabular'
Plugin 'hdima/python-syntax'
Plugin 'lervag/vimtex'
Plugin 'xuhdev/vim-latex-live-preview'
Plugin 'calviken/vim-gdscrīpt3'
Plugin 'skywind3000/asyncrun.vim'
Plugin 'humiaozuzu/dot-vimrc'
Plugin 'artur-shaik/vim-javacomplete2'
Plugin 'preservim/nerdtree'
Plugin 'Lokaltog/vim-powerline'
Plugin 'vim-scrīpts/javacomplete'
Plugin 'tpope/vim-commentary'
Plugin 'vim-syntastic/syntastic'
Plugin 'preservim/tagbar'
Plugin 'vim-airline/vim-airline'
Plugin 'walm/jshint.vim'
Plugin 'pangloss/vim-javascrīpt'
Plugin 'jamescarr/snipmate-nodejs'
Plugin 'myhere/vim-nodejs-complete'
Plugin 'guileen/vim-node'
Plugin 'fatih/vim-go'
call vundle#end()
filetype plugin indent on
set backspace=indent,eol,start
"Mode Settings

let &t_SI.="\e[5 q" "SI = INSERT mode
let &t_SR.="\e[4 q" "SR = REPLACE mode
let &t_EI.="\e[1 q" "EI = NORMAL mode (ELSE)

"Cursor settings:

"  1 -> blinking block
"  2 -> solid block
"  3 -> blinking underscore
"  4 -> solid underscore
"  5 -> blinking vertical bar
"  6 -> solid vertical bar



"let &t_SI = "\]50;CursorShape=1\x7"
"let &t_SR = "\]50;CursorShape=2\x7"
"let &t_EI = "\]50;CursorShape=0\x7"


"set guicursor=n-c-v:ver1000-ncvCursor
let g:ycm_global_ycm_extra_conf='~/.vim/bundle/YouCompleteMe/third_party/ycmd/.ycm_extra_conf.py'
let g:ale_sign_column_always = 1
let g:ale_set_hightlights = 1
let g:ale_sign_error = 'x'
let g:ale_sign_warning = '!'
let g:ale_linters = { 'python':['pylint']}
let g:syntastic_python_checkers=['python3.8.5']
let g:ncm_r_column_layout = 0
"let g:vimtex_latexmk_options='-pdf -pdflatex="xelatex -synctex=1 \%S \%O" -verbose -file-line-error -interaction=nonstopmode'
let g:tex_flavor='latex'
let g:vimtex_view_method='skim'
let g:vimtex_quickfix_mode=0
set conceallevel=1
let g:tex_conceal='abdmg'
let g:asyncrun_open = 6
let g:asyncrun_bell = 1

map  :call asyncrun#quickfix_toggle(6)
nmap  :TagbarToggle
map  :call CompileRunGcc()

    func! CompileRunGcc()

        exec "w"

if &filetype == 'c'

    exec "!g++ % -o %<"

    exec "!time ./%<"

elseif &filetype == 'cpp'

    exec "!g++ % -o %<"

    exec "!time ./%<"

elseif &filetype == 'java'

    exec "!javac %"

    exec "!time java %<"

elseif &filetype == 'sh'

    :!time bash %

elseif &filetype == 'python'

    exec "!time python %"

elseif &filetype == 'html'

    exec "!/opt/apps/org.mozilla.firefox-nal/files/firefox % &"

elseif &filetype == 'go'

    exec "!go build %<"

    exec "!time go run %"

elseif &filetype == 'mkd'

    exec "!~/.vim/markdown.pl % > %.html &"

    exec "!/opt/apps/org.mozilla.firefox-nal/files/firefox %.html &"

elseif &filetype == 'tex'
    
        exec "!evince %:r.pdf &"
elseif &filetype == 'lua'

        exec "!time lua %"

endif

    endfunc

我的vim配置文件，希望对你有些帮助2333，可以自动cpp补全

上世纪？？您对vim偏见是有多大啊

代码中至少存在的问题：

……
// #include   // 此代码用不到，且 stdlib.h 是C形式的……    for (int i = 0; i < b; i++) {  // i 没赋初值……    int max = a[0];  // max 也没赋初值
    for (int d = 0; d < b; d++) {  // d 没赋初值
……    cout << max << endl;  // 输出没换行，默认行缓冲（换行才输出）
    // while(true);  // 没啥用，这行死循环，程序不退出，导致上一行迟迟没输出……

编译运行：

g++ main.cpp && ./a.out  # 假设文件名是 main.cpp

我早点看到这个帖子也不用绕那么大的弯了

用VIM写，老黄历了吧

vim可以debug直接运行，关键是有丰富的命令生态，比如正则化，这些是ide提供不了的

正则化是啥，正则搜索替换吗

谢谢大佬，刚改lin，以前都算用vc的，不知道有这摩多规矩