Implement Stack Using Array with Push and Pop Operations

Code

#include <stdio.h>
#include <stdint.h>
#include <string.h>

#define MAX 10

void process_stack(int n) {
    // Your logic here
    int arr[MAX] = {0};
    char char_arr[MAX];
    int input,index=0;

    for (int i=0; i<n; i++)
    {
        scanf("%s",char_arr);
        // printf("%s\n",char_arr);
        if(strcmp("push",char_arr)==0)
        {
            scanf("%d",&input);
            if(index >= MAX)
            {
                printf("Stack Overflow\n");
            }
            else
            {
                arr[++index]=input;
            }
            // printf("push data = %d\n",input);
        }
        if(strcmp("pop",char_arr)==0)
        {
            if(index == 0)
            {
                printf("Stack Underflow\n");
            }
            else
            {
                printf("%d\n",arr[index--]);
            }
            // printf("pop data\n");
        }        
    }
}

int main() {
    int n;
    scanf("%d", &n);
    getchar(); // Consume newline after number

    process_stack(n);
    return 0;
}

Solving Approach