Library Help

[fivestar]

Im trying to make a simple library but im getting a lot of errors when compiling.
this is what i have so far.

 #ifndef my_library
#define my_library

void out(string x);

void out(string x){
cin >>x;
cout <<"Entered "<< x;
}
#endif 

[shadder]

well you may start with a struct (or class maybe)
http://www.cplusplus.com/doc/tutorial/structures/