View Compilation Error

0_0_18126171_21311.cpp: In function 'void init()':
0_0_18126171_21311.cpp:21:7: error: 'f' was not declared in this scope
       f[j]=phi[j]/i*(i-1);
       ^
0_0_18126171_21311.cpp: In function 'int main()':
0_0_18126171_21311.cpp:53:12: error: 'phi_table' was not declared in this scope
  phi_table();
            ^