#include <system.h>
 
 void main()
      {
        int i;
        
        clrscr();
        printf("Scroll Bar Test");
        for(i=0;i<60;i+=5)
        {
          SetScrollBar(60,i);
          sleep(1);
        }
        
        getchar();
        return 0;
      }
编译器显示是这，是什么原因？
c:\users\asus\desktop\调试程序\显示滚动条.cpp(1) : fatal error C1083: Cannot open include file: 'system.h': No such file or directory