View Compilation Error

0_0_30844423_25055.cpp: In function 'int main()':
0_0_30844423_25055.cpp:23:24: error: cannot convert 'std::string {aka std::basic_string<char>}' to 'char*' for argument '1' to 'int jmul(char*)'
   put[count++] = jmul(s);
                        ^