如何实现用键盘的上下和回车键选择菜单。
比如有存款，取款，转账等菜单选项，然后用上下健移动，用回车进入其中一个子函数

需要用windows API来操作吧

哇~现在正在自学windows API 要记的东西很多~做游戏要用啊~~~~~~~~~~

Windows环境试试：

#include <stdio.h>
#include <windows.h>

HANDLE hStd = 0;

void _Say(SHORT x, SHORT y, char *s, WORD Color)
{
    SetConsoleTextAttribute(hStd, Color);
    COORD pos = {x, y};
    SetConsoleCursorPosition(hStd, pos);
    printf(s);
}

void _menu(char *menu[], int count, int sele)
{
    WORD selecolor = BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED;
    WORD forecolor = FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED;
    int i;
    for (i=0; i<count; i++)
        if (i == sele)
            _Say(i*10+2, 3, menu[i], selecolor);
        else
            _Say(i*10+2, 3, menu[i], forecolor);
}

main()
{
    hStd = GetStdHandle(STD_OUTPUT_HANDLE);
    char *menu[]={"菜单1","菜单2","菜单3"};
    int k, sele=0, menucount=3;
    printf("\n用上下左右方向键选择，回车确定\n");
    _menu(menu, menucount, sele);
    while ((k=getch()) != '\r')
    {
        if (k==72 || k==75 || k==77 || k==80)
        {
            sele = (k==72 || k==75) ? --sele : ++sele;
            if (sele == menucount)
                sele = 0;
            else if (sele < 0)
                sele = menucount - 1;
            _menu(menu, menucount, sele);
        }
    }
    SetConsoleTextAttribute(hStd, FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED);   
    printf("\n\n选择：%s\n", menu[sele]);
}

改一下：
#include<stdio.h>
#include<windows.h>

HANDLE hStd = 0;

void _Say(SHORT x, SHORT y, char *s, WORD Color)
{
    SetConsoleTextAttribute(hStd, Color);
    COORD pos = {x, y};
    SetConsoleCursorPosition(hStd, pos);
    printf(s);
}

void _menu(char *menu[], int count, WORD color)
{
    int i;
    for (i=0; i<count; i++)
        _Say(i*10+2, 3, menu[i], color);
}

main()
{
    hStd = GetStdHandle(STD_OUTPUT_HANDLE);
    WORD selecolor = BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED;
    WORD forecolor = FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED;
    char *menu[]={"菜单1","菜单2","菜单3"};
    int k, sele=0, menucount=3;
    printf("\n用上下左右方向键选择，回车确定\n");
    _menu(menu, menucount, forecolor);
    _Say(sele*10+2, 3, menu[sele], selecolor);
    while ((k=getch()) != '\r')
    {
        if (k==72 || k==75 || k==77 || k==80)
        {
            _Say(sele*10+2, 3, menu[sele], forecolor);
            sele = (k==72 || k==75) ? --sele : ++sele;
            if (sele == menucount)
                sele = 0;
            else if (sele < 0)
                sele = menucount - 1;
            _Say(sele*10+2, 3, menu[sele], selecolor);
        }
    }
    SetConsoleTextAttribute(hStd, forecolor);
    printf("\n\n选择：%s\n", menu[sele]);
}

改写您的回答。
有个不情之请，您能否把程序的每条语句解释一下好吗？
如果可以的话。

就几个简单的API函数，随便搜搜都有料。

好。