// con02.c
#include <windows.h>
#include <stdio.h>
#include <conio.h>

int Locate(HANDLE, int, int);
int TxtPrint(HANDLE, char *);

int main()
{
    HANDLE hStdout;
    SYSTEMTIME st;
    char str[32];
        
    hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
    
    while(!_kbhit())
    {
        Locate(hStdout, 10, 10);
        GetLocalTime(&st);
        wsprintf(str, "現在%2d時%2d分%2d秒です",
            st.wHour, st.wMinute, st.wSecond);
        TxtPrint(hStdout, str);
        Sleep(500);
    }
    return 0;
}

int Locate(HANDLE hOut, int x, int y)
{
    COORD dwPos;
    dwPos.X = (SHORT)x;
    dwPos.Y = (SHORT)y;

    if (SetConsoleCursorPosition(hOut, dwPos) == 0) return -1;
    else    return 0;
}

int TxtPrint(HANDLE hOut, char *str)
{
    BOOL bResult;
    DWORD dwResult;

    bResult = WriteConsole(hOut, (CONST VOID *)str, (DWORD)lstrlen(str), &dwResult, NULL);
    if (bResult == 0)   return -1;
    else                return 0;
}