View Compilation Error

0_0_14241254_11034.c: In function 'main':
0_0_14241254_11034.c:23:14: error: 'N' undeclared (first use in this function)
     char str[N];
              ^
0_0_14241254_11034.c:23:14: note: each undeclared identifier is reported only once for each function it appears in