C++调用函数模仿数字钟表

调用系统函数，可以得到系统时间

#include<iostream> 
#include<windows.h>
#include<time.h>
using namespace std;
int main()
{
    time_t rawtime;
    
    while(true){
    time(&rawtime);
    tm *timeinfo=localtime(&rawtime);
    system("cls");
    cout<<timeinfo->tm_year+1900<<"年"<<timeinfo->tm_mon+1<<"月"<<timeinfo->tm_mday<<"日"<<endl; 
    cout<<timeinfo->tm_hour<<":"<<timeinfo->tm_min<<":"<<timeinfo->tm_sec<<endl;
    Sleep(1000);
    }
    return 0; 
}