88. Implement Stack Using Array with Push and Pop Operations

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

#define MAX 10
int stack[MAX];
int top = -1;

void push(int val) {
    if (top < MAX -1)
        stack[++top] = val;
}

void pop(void)
{
    if (top != -1)
        printf("%d\n", stack[top--]);
}

void process_stack(int n) {
    char cmd[10];
    int val = 0;

    for (int i = 0; i < n; i++) {
        scanf("%s", cmd);

        if (strcmp(cmd, "push") == 0) {
            scanf("%d", &val);
            if (top >= MAX - 1)
                printf("Stack Overflow\n");
            else {
                push(val);
            }        
        } else if (strcmp(cmd, "pop") == 0) {
            if (top == -1)
                printf("Stack Underflow\n");
            else
                pop();
        }
    }
}

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

    process_stack(n);
    return 0;
}