/in/calc.cpp:37:22: error: expression result unused [-Werror,-Wunused-value]
                for (i; i <12; i++){
                     ^
/in/calc.cpp:69:10: error: expression result unused [-Werror,-Wunused-value]
    for (i; i < input.size();i++){
         ^
/in/calc.cpp:74:1: error: control may reach end of non-void function [-Werror,-Wreturn-type]
}
^
/in/calc.cpp:93:22: error: expression result unused [-Werror,-Wunused-value]
            delete a,b;
                     ^
/in/calc.cpp:126:26: error: expression result unused [-Werror,-Wunused-value]
                delete a,b;
                         ^
5 errors generated.
/in/Compile/Makefile:44: recipe for target 'buildCalc' failed
make: *** [buildCalc] Error 1