C++调用API获取当前时间

#include <string>
#include<iostream>
#include<windows.h>
#include <sstream>
using namespace std;

string WORDToString(WORD w)
{
    char tmpbuff[];
    sprintf(tmpbuff,"%d",w);
    string res=tmpbuff;
    return res;
}
string getTime()
{
    string week[]={"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
    SYSTEMTIME now;   
    string currentTime;  
    GetLocalTime( &now );   
    currentTime=WORDToString(now.wYear)+"年"  
        +WORDToString(now.wMonth)+"月"  
        +WORDToString(now.wDay)+"日"
        +"("+week[now.wDayOfWeek]+") "
        +WORDToString(now.wHour)+":"  
        +WORDToString(now.wMinute)+":"  
        +WORDToString(now.wSecond)+" "  
        +WORDToString(now.wMilliseconds)+"ms";  
    return currentTime;
}
int main()
{
    cout<<getTime()<<endl;
    return ;
}