Ошибки в многофайловом проекте

In file included from menu.h:6:0,
                 from mainFile.cpp:11:
Errors.h: In function 'void takeVolumeError(bool)':
Errors.h:15:27: warning: parameter 'cycleRepeat' set but not used [-Wunused-but-
set-parameter]
 void takeVolumeError(bool cycleRepeat)
                           ^~~~~~~~~~~
In file included from mainFile.cpp:11:0:
menu.h: In function 'std::__cxx11::string menu()':
menu.h:45:26: warning: conversion to 'char' from 'int' may alter its value [-Wco
nversion]
   takeMenuChoose = _getch();
                    ~~~~~~^~
mainFile.cpp: In function 'int main(int, char**)':
mainFile.cpp:18:12: warning: conversion to 'unsigned int' from 'time_t {aka long
 int}' may change the sign of the result [-Wsign-conversion]
  srand(time(NULL)); //╙ёЄрэютър яюёЄю*ээющ ёыєўрщэюёЄш ўшёхы
        ~~~~^~~~~~
mainFile.cpp:15:14: warning: unused parameter 'argc' [-Wunused-parameter]
 int main(int argc, char** argv)
              ^~~~
mainFile.cpp:15:27: warning: unused parameter 'argv' [-Wunused-parameter]
 int main(int argc, char** argv)
                           ^~~~
In file included from mainFile.cpp:11:0:
menu.h: In function 'std::__cxx11::string menu()':
menu.h:71:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^