38 lines
590 B
C++
38 lines
590 B
C++
|
#include <iostream>
|
||
|
|
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
class MyStack {
|
||
|
|
private:
|
||
|
|
int lastIndex = -1;
|
||
|
|
int numbers[100] = {};
|
||
|
|
public:
|
||
|
|
void push(int n);
|
||
|
|
void pop();
|
||
|
|
void back();
|
||
|
|
void size();
|
||
|
|
void clear();
|
||
|
|
};
|
||
|
|
|
||
|
|
void MyStack::push(int n) {
|
||
|
|
this->numbers[++this->lastIndex] = n;
|
||
|
|
}
|
||
|
|
|
||
|
|
void MyStack::pop() {
|
||
|
|
if (lastIndex < 0) return;
|
||
|
|
MyStack::back();
|
||
|
|
this->lastIndex--;
|
||
|
|
}
|
||
|
|
|
||
|
|
void MyStack::back() {
|
||
|
|
cout << this->numbers[this->lastIndex] << endl;
|
||
|
|
}
|
||
|
|
|
||
|
|
void MyStack::size() {
|
||
|
|
cout << this->lastIndex+1 << endl;
|
||
|
|
}
|
||
|
|
|
||
|
|
void MyStack::clear() {
|
||
|
|
this->lastIndex = -1;
|
||
|
|
}
|