View Compilation Error

0_0_13918513_22795.cpp: In function 'void modify(const int&, const int&, const int&, const int&, const int&)':
0_0_13918513_22795.cpp:39:27: error: return-statement with a value, in function returning 'void' [-fpermissive]
  if( Ind >= maxt ) return 1; 
                           ^