I am experiencing something weird with my c++ source file or perhaps the compiler itself. It seems that when I attempt to compile the file, it hits me with a message -
undefined reference to "Basic_int_stack::Basic_int_stack()
undefined reference to "Basic_int_stack::Push(int)
Here is my code (I'm still a beginner so don't expect any crazy professional code )
Header file:
class Basic_int_stack
{
public:
// This part should be implementation independent.
Basic_int_stack(); // constructor
void push( int item );
int pop();
int top();
int size();
bool empty();
private:
// This part is implementation-dependant.
static const int capacity = 10 ; // the array size
int A[capacity] ; // the array.
int top_index ; // this will index the top of the stack in the array
};
Implementations:
#include "basic_int_stack.h"// contains the declarations of the variables and functions.
Basic_int_stack::Basic_int_stack(){
// the default constructor intitializes the private variables.
top_index = -1; // top_index == -1 indicates the stack is empty.
}
void Basic_int_stack::push( int item ){
top_index = top_index + 1;
A[top_index] = item ;
}
int Basic_int_stack::top(){
return A[top_index];
}
int Basic_int_stack::pop(){
top_index = top_index - 1 ;
return A[ top_index + 1 ];
}
bool Basic_int_stack::empty(){
return top_index == -1 ;
}
int Basic_int_stack::size(){
return top_index;
}
Main Function:
#include "basic_int_stack.h"
#include <iostream>
int main()
{
int var;
Basic_int_stack s1;
while((std::cin >> var)>=0){
s1.push(var);
}
return 0;
}
