View Compilation Error

0_0_31469837_8740.cpp: In function 'int sum(char*, char*, char*)':
0_0_31469837_8740.cpp:38:4: error: expected primary-expression before '%' token
    %
    ^
0_0_31469837_8740.cpp:38:4: error: expected primary-expression at end of input
0_0_31469837_8740.cpp:38:4: error: expected '}' at end of input
0_0_31469837_8740.cpp:38:4: error: expected '}' at end of input
0_0_31469837_8740.cpp:38:4: error: expected '}' at end of input
0_0_31469837_8740.cpp:38:4: error: expected '}' at end of input