こういうエラーが出るのですが、何がまずいのでしょうか？

> make
g++ -Wall main.cpp -c
main.cpp:4: error: `n' was not declared in this scope
main.cpp:4: error: `n' was not declared in this scope
main.cpp: In function `void func(int)':
main.cpp:10: error: `array' undeclared (first use this function)
main.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
main.cpp: In function `int main(int, void**)':
main.cpp:5: error: too many arguments to function `void func(int)'
main.cpp:28: error: at this point in file
*** Error code 1