I know how to get this done in Java, but I can't figure out how to do it in C++ Here is my questions: I have a class called "stack" and I create different Objects from stack class in my main method. I want to store a variable in the stack class, so all the Object can access the variable. My header file:
Template<class Item>
struct stackLinked{
Item value;
stackLinked* next;
}
Template<class T>
class stack{
public:
static int stored;
.......
.......
private:
.......
}
My main function:
stack<T> temp;
temp.stored=1;
stack<T> numbers;
stack<T> operations;
................
When I stored the value into temp, can numbers and operations have the same variable (same value)?
Yes. Static variable is one for all instances of stack. Every instance has access to the one and same static variable.
Example:
#include <iostream>
using namespace std;
class stack{
public:
static int stored;
};
int stack::stored; // definition of static variable, necessary
int main() {
// your code goes here
stack s, m, n;
s.stored = 4;
std::cout << s.stored << "," << m.stored << "," << n.stored << std::endl;
m.stored = 5;
std::cout << s.stored << "," << m.stored << "," << n.stored << std::endl;
n.stored = 1;
std::cout << s.stored << "," << m.stored << "," << n.stored << std::endl;
return 0;
}
output:
4,4,4
5,5,5
1,1,1
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