c++ - IO operator overloading error -

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in .h file

ostream& operator <<(ostream &os,const object &);

in .cpp file

ostream& operator <<(ostream &os,const object &mono) {     os << mono.coef<<" *x^"<<mono.degree;     return os;       }

errors getting:

error c2143: syntax error : missing ';' before '&'
error c4430: missing type specifier - int assumed. note: c++ not support default-int
error c2061: syntax error : identifier 'ostream'
error c4430: missing type specifier - int assumed. note: c++ not support default-int error c2805: binary 'operator <<' has few parameters

i've checked every io overloading tutorial can found yet cannot fix this.

edit: adding std:: fixed every error except "> error c2805: binary 'operator <<' has few parameters " dont know means

edit2: declaring function friend solved this. everyone!

you using ostream without qualifying namespace std::

use

std::ostream& operator <<(std::ostream& os,const object& mono)


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