View Compilation Error

0_0_2422669_4407.c: In function `main':
0_0_2422669_4407.c:8: error: `N' undeclared (first use in this function)
0_0_2422669_4407.c:8: error: (Each undeclared identifier is reported only once
0_0_2422669_4407.c:8: error: for each function it appears in.)
0_0_2422669_4407.c:16: error: syntax error before '}' token
0_0_2422669_4407.c:18: error: syntax error before "sz"