在控制台固定位置显示动态数据, 如时间，进度等

主要用到的关键api有两个:

1. GetConsoleScreenBufferInfo

用来获取当前光标位置

2. SetConsoleCursorPosition

用来设置控制台光标位置

 

示例代码:

#define _AFXDLL

#include <afx.h> 

#include <iostream> 

using namespace std;

int main()
{
    for (int i = 0; i < 10; i++) {
        printf("*print something*\n");
    }
    cout << "show current time: " << endl;
    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    CONSOLE_SCREEN_BUFFER_INFO consoleScreenBufferInfo;
    GetConsoleScreenBufferInfo(hConsole, &consoleScreenBufferInfo);
    SHORT x = consoleScreenBufferInfo.dwCursorPosition.X;
    SHORT y = consoleScreenBufferInfo.dwCursorPosition.Y;
    COORD coordScreen = {x, y};
    CTime tm = 0;
    int sec = 0;
    int span = 10;
    while (1)
    {
        tm = CTime::GetCurrentTime();
        if (sec != tm.GetSecond()){
            if (span <= 0) {
                break;
            }
            span--;
            sec = tm.GetSecond();
            SetConsoleCursorPosition(hConsole, coordScreen);
            printf("%04d-%02d-%02d %02d:%02d:%02d\n", 
                tm.GetYear(), tm.GetMonth(), tm.GetDay(), 
                tm.GetHour(), tm.GetMinute(), tm.GetSecond());
        }
    }
    cout << "end" << endl;
    return 0;
}