View Compilation Error

0_0_33039702_27806.cpp: In function 'int main()':
0_0_33039702_27806.cpp:8:48: error: expected ';' before 'mod7'
  for(int i=2;i<=n;i++) v[i]=(v[i-1]*a+v[i-2]*b)mod7; 
                                                ^