Stack Error

 try{
        if(intStack.push(word)){
            throw DatatypeError("Invalid Datatype");}
    }catch (DatatypeError& error){
        std::cout << "Exception: " << error.what() << std::endl;
    }

ERRROR

/cygdrive/d/Advanced C++/03/main.cpp: In function 'int main()':
/cygdrive/d/Advanced C++/03/main.cpp:173:12: warning: init-statement in selection statements only available with -std=c++1z or -std=gnu++1z
         if(intStack.push(word);){
            ^~~~~~~~
/cygdrive/d/Advanced C++/03/main.cpp:173:30: error: no matching function for call to 'Stack<int>::push(std::string&)'
         if(intStack.push(word);){
                              ^
In file included from /cygdrive/d/Advanced C++/03/main.h:11:0,
                 from /cygdrive/d/Advanced C++/03/main.cpp:13:
/cygdrive/d/Advanced C++/03/Stack.h:23:10: note: candidate: void Stack<stackType>::push(stackType) [with stackType = int]
     void push (stackType x);
          ^~~~
/cygdrive/d/Advanced C++/03/Stack.h:23:10: note:   no known conversion for argument 1 from 'std::string {aka std::basic_string<char>}' to 'int'
/cygdrive/d/Advanced C++/03/main.cpp:173:32: error: expected primary-expression before ')' token
         if(intStack.push(word);){
                                ^
make[3]: *** [CMakeFiles/03.dir/build.make:63: CMakeFiles/03.dir/main.cpp.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [CMakeFiles/Makefile2:73: CMakeFiles/03.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:85: CMakeFiles/03.dir/rule] Error 2
make: *** [Makefile:118: 03] Error 2