View Compilation Error

0_0_30839181_25418.cpp: In function 'int calc_2(int, int, int, int)':
0_0_30839181_25418.cpp:42:14: error: expected primary-expression before '%' token
   if(s[i] == %
              ^
0_0_30839181_25418.cpp:42:14: error: expected primary-expression at end of input
0_0_30839181_25418.cpp:42:14: error: expected ')' at end of input
0_0_30839181_25418.cpp:42:14: error: expected statement at end of input
0_0_30839181_25418.cpp:42:14: error: expected '}' at end of input
0_0_30839181_25418.cpp:42:14: error: expected '}' at end of input