Question

I have experience in C++ but have recently been using python exclusively at work, and I am very rusty. Each file is listed below:

main.cpp

#include "stack.h"

int main(int argc, char** argv){
    return 0;
}

stack.h

#ifndef STACK_H
#define STACK_H

#define NULL 0

template <class elementType>
class stack{

    struct node
    {
        elementType data;
        node* next;
    };

    node* top;

public:

    stack(){
        top = NULL;
    }

    ~stack(){
        node temp = top;
        while (top != NULL){
            top = top->next;
            delete temp;
        }
    }

    void push(elementType x){
        node temp = new node();
        temp.data = x;
        temp.next = top;
        top = temp;
    }

    elementType pop(){
        node temp = top;
        top = top->next;
        return temp;
    }

    bool isEmpty(){
        return top == NULL;
    }
};

#endif //STACK_H

makefile

a.out : main.o stack.o
    gcc -o a.out main.o stack.o

main.o : main.cpp stack.h 
    gcc -O -c main.cpp

stack.o : stack.h
    gcc -O -c stack.h

clean :
    rm main.o stack.o

So, when I cd in to the project directory and type make i get:

gcc -O -c main.cpp
gcc -O -c stack.h
stack.h:7:10: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token
make: *** [stack.o] Error 1

I’ve been searching around for a solution, but as far as I can tell my code is correct. I’m not looking for help with the actual stack implementation, and I realize this code won’t actually do anything with an empty main, but I can’t seem to fix this compile error.

Answer 1

Use g++ to compile C++, not gcc. Also, you don’t need to compile a header.