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Write a C++ program to implement stack using array with push, pop, and display operations
Here is a C++ program to implement a stack using an array:
#include <iostream>
using namespace std;
#define MAX 100
class Stack {
int arr[MAX];
int top;
public:
Stack() { top = -1; }
void push(int x) {
if (top >= MAX-1) {
cout << "Stack Overflow" << endl;
return;
}
arr[++top] = x;
}
void pop() {
if (top < 0) {
cout << "Stack Underflow" << endl;
return;
}
top--;
}
void display() {
for (int i = top; i >= 0; i--)
cout << arr[i] << " ";
cout << endl;
}
};The push operation adds an element to the top of the stack. The pop operation removes the top element. The display function prints all elements from top to bottom.
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AIM
To implement a stack data structure using an array and perform push, pop, and display operations.
THEORY
A stack is a linear data structure that follows the Last In First Out (LIFO) principle. Elements are added and removed from the same end, called the top. In an array-based implementation, a variable tracks the index of the top element.
PROCEDURE
- Define a class Stack with an integer array and a top pointer.
- Implement push() to add elements at the top index.
- Implement pop() to remove elements from the top index.
- Implement display() to print all elements top to bottom.
- Create main() with a menu-driven interface.
CODE
#include <iostream>
using namespace std;
#define MAX 100
class Stack {
int arr[MAX]; int top;
public:
Stack() { top = -1; }
void push(int x) {
if(top>=MAX-1){cout<<"Overflow";return;}
arr[++top]=x;
}
void pop() {
if(top<0){cout<<"Underflow";return;}
cout<<"Popped: "<<arr[top--]<<endl;
}
void display() {
for(int i=top;i>=0;i--) cout<<arr[i]<<" ";
cout<<endl;
}
};
int main() {
Stack s; int ch, val;
do {
cout<<"1.Push 2.Pop 3.Display 4.Exit
";
cin>>ch;
switch(ch){
case 1:cin>>val;s.push(val);break;
case 2:s.pop();break;
case 3:s.display();break;
}
} while(ch!=4);
}RESULTS
$ ./stack_program
1.Push 2.Pop 3.Display 4.Exit
1
10
1.Push 2.Pop 3.Display 4.Exit
1
20
1.Push 2.Pop 3.Display 4.Exit
3
20 10
1.Push 2.Pop 3.Display 4.Exit
2
Popped: 20
1.Push 2.Pop 3.Display 4.Exit
3
10
1.Push 2.Pop 3.Display 4.Exit
4
$ _
Terminal screenshot auto-captured by AssignDone
CONCLUSION
The stack data structure was successfully implemented using an array. Push, pop, and display operations were tested and verified. The program correctly follows the LIFO principle for all operations.
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THE COMPARISON
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