Help Please! I'm only a Beginner!

Hi! I've made a game where a random number is generated. The user then choose to play against the computer or another player. They then try to guess the number but I have a few errors! If you could email any help I would be extreamly greatful. Sorry if its a bit long, I'm just a beginer after all. Thanks!

The errors are:-

The numbers in brackets are the line numbers.

(374) : error C2059: syntax error : 'if'
(375) : error C2447: '{' : missing function header (old-style formal list?)
(391) : error C2059: syntax error : '}'
(391) : error C2143: syntax error : missing ';' before '}'
(391) : error C2059: syntax error : '}'
(394) : error C2059: syntax error : 'if'
(395) : error C2447: '{' : missing function header (old-style formal list?)
(399) : error C2059: syntax error : 'else'
(400) : error C2447: '{' : missing function header (old-style formal list?)
(404) : error C2470: 'Score' : looks like a function definition, but there is no formal parameter list; skipping apparent body
(406) : error C2059: syntax error : 'if'
(410) : error C2059: syntax error : 'else'
(411) : error C2447: '{' : missing function header (old-style formal list?)
(415) : error C2059: syntax error : 'if'
(416) : error C2447: '{' : missing function header (old-style formal list?)
(426) : error C2059: syntax error : 'else'
(427) : error C2447: '{' : missing function header (old-style formal list?)

Could you be a bit more specific please? What types of bugs do you have? When do they occur? What specifically is going wrong?