/in/ex5.cpp: In member function 'bool bookInventory::repOK()':
/in/ex5.cpp:22:18: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
     for(int i=0;i<numBooks;i++){
                 ~^~~~~~~~~
/in/ex5.cpp:27:25: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
     for(int i=numBooks;i<size;i++){
                        ~^~~~~
cc1plus: all warnings being treated as errors
/in/compile/Makefile:26: recipe for target 'ex5.o' failed
make: *** [ex5.o] Error 1