/in/foo.cc: In function 'int main()':
/in/foo.cc:25:15: error: lvalue required as increment operand
  for(i=0;i<5;1++)
               ^~
/in/foo.cc:6:14: warning: unused variable 'max' [-Wunused-variable]
  int i,j,n,t,max;
              ^~~