View Compilation Error

216840_0_18166.c: In function `main':
216840_0_18166.c:3: error: syntax error before '.' token
216840_0_18166.c:4: error: `n' undeclared (first use in this function)
216840_0_18166.c:4: error: (Each undeclared identifier is reported only once
216840_0_18166.c:4: error: for each function it appears in.)
216840_0_18166.c:4: error: `m' undeclared (first use in this function)