Scusate la mia ignoranza, ma non ci riesci proprio!!

Sto provando e riprovando, e mi spiace di rompervi le balle..

cmq ora mi esce questo errore

loris@Portatile:~$ cd /home/loris/scrivania
bash: cd: /home/loris/scrivania: Nessun file o directory
loris@Portatile:~$ cd /home/loris/Desktop
loris@Portatile:~/Desktop$ g++ main.CPP -o main
main.CPP:1:18: error: conio.h: Nessun file o directory
In file included from /usr/include/c++/4.1.3/backward/iostream.h:31,
from main.CPP:3:
/usr/include/c++/4.1.3/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <iostream> instead of the deprecated header <iostream.h>. To disable this warning use -Wno-deprecated.
main.CPP:5: error: ‘::main’ must return ‘int’
main.CPP: In function ‘int main()’:
main.CPP:7: error: ‘clrscr’ was not declared in this scope
main.CPP:157: error: ‘getch’ was not declared in this scope
loris@Portatile:~/Desktop$