visual c++运行如下程序提示的错误，高手帮解决下1！急！！！！！111

Window(1,1,80,25);
textbackground(1);
textcolor(YELLOW);
system("cls");
printf("*************************************************************");
printf("**** ------银行窗口模拟系统------ ****");
printf("**** 制作人:刘佳宁 刘茜 ****");
printf("**** 高遵富 梁舒 ****");
printf("*************************************************************");
if(mini==60)
{
tim++;
if(tim==12)
{printf("\n\n\n\n\n 现在时间 12:00\n");
printf("\n 银行已经停止营业!\n");
sleep(2);
printf("\n 正在注销系统...\n");
sleep(2);
printf("\n 正在关闭系统...\n");
printf("\n\n\n\n\n\n\n****************************************");
sleep(4);
以下是错误提示：C:\Program Files\Microsoft Visual Studio\MyProjects\bank1\bank1.cpp(42) : error C2065: 'Window' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\MyProjects\bank1\bank1.cpp(43) : error C2065: 'textbackground' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\MyProjects\bank1\bank1.cpp(44) : error C2065: 'textcolor' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\MyProjects\bank1\bank1.cpp(44) : error C2065: 'YELLOW' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\MyProjects\bank1\bank1.cpp(57) : error C2065: 'sleep' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\MyProjects\bank1\bank1.cpp(223) : error C2065: 'clrscr' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\MyProjects\bank1\bank1.cpp(224) : error C2065: 'window' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\MyProjects\bank1\bank1.cpp(245) : warning C4508: 'main' : function should return a value; 'void' return type assumed
Error executing cl.exe.