Question

How to implement a stack using an array with push, pop, and display in C

Answer 1

#include <stdio.h>

#define SIZE 128

int stack[SIZE], top = -1;

void push(int value) {
    if (top == SIZE - 1)
        printf("Stack Overflow\n");
    else
        stack[++top] = value;
}

void pop() {
    if (top == -1)
        printf("Stack Underflow\n");
    else
        top--;
}

void display() {
    if (top == -1)
        printf("Stack is empty\n");
    else {
        printf("Stack:\n");
        for (int i = top; i >= 0; i--)
            printf("%d\n", stack[i]);
    }
}

int main() {
    push(10);
    push(20);
    push(30);
    push(40);
    
    display();
    
    pop();
    
    puts("");
    
    display();
    
    return 0;
}


  
 
/* 
run:
 
Stack:
40
30
20
10

Stack:
30
20
10
 
*/

 

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