View Compilation Error

632590_0_0_31627.cpp:2: error: `main' must return `int'
632590_0_0_31627.cpp: In function `int main(...)':
632590_0_0_31627.cpp:3: error: `N' undeclared (first use this function)
632590_0_0_31627.cpp:3: error: (Each undeclared identifier is reported only once for each function it appears in.)
632590_0_0_31627.cpp:8: error: expected `}' at end of input