View Compilation Error

0_0_37332568_6871.c: In function 'main':
0_0_37332568_6871.c:4:1: error: variable-sized object may not be initialized
 int a[2*N+1]={0},b[2*N+1]={0};
 ^
0_0_37332568_6871.c:4:1: error: variable-sized object may not be initialized