View Compilation Error

0_0_32855537_17764.cpp:2:9: error: 'N' was not declared in this scope
 int phi[N];
         ^
0_0_32855537_17764.cpp: In function 'void phi_table(int)':
0_0_32855537_17764.cpp:4:29: error: 'phi' was not declared in this scope
     for(int i = 2;i<=n;i++) phi[i] = 0;
                             ^
0_0_32855537_17764.cpp:5:5: error: 'phi' was not declared in this scope
     phi[1] = 1;
     ^