ARM菜鸟求助了～～～～

Uart_Printf("\nPlaease enter current year:\n");
ucGetYear = Uart_GetIntNum();
Uart_Printf("\nCurrent year is %d", ucGetYear+2000);

Uart_Printf("\nPlease enter current month:\n");
ucGetMonth = Uart_GetIntNum();
Uart_Printf("\nCurrent month is %d", ucGetMonth);

Uart_Printf("\nPlaease enter current day:\n");
ucGetDay = Uart_GetIntNum();
Uart_Printf("\nCurrent day is %d", ucGetDay);

Uart_Printf("\nPlaease enter current date:\n");
ucGetDay = Uart_GetIntNum();
Uart_Printf("\nCurrent date is %d", ucGetDay);

Uart_Printf("\nPlaease enter current hour:\n");
ucGetHour = Uart_GetIntNum();
Uart_Printf("\nCurrent day is %d", ucGetHour);

Uart_Printf("\nPlaease enter current minute:\n");
ucGetMin = Uart_GetIntNum();
Uart_Printf("\nCurrent day is %d", ucGetMin);

Uart_Printf("\nPlaease enter current second: \n");
ucGetSec = Uart_GetIntNum();
Uart_Printf("\nCurrent day is %d", ucGetSec);

在程序运行的时候，串口总是没有正确接受键盘输入的数字，在google搜索了一下，说是要在Main()开始的时候加__rt_lib_init（）；我加了以后，程序干脆罢工了，向各位前辈求助，感激不禁！