Implement Stack Using Array with Push and Pop Operations

Code

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

#define MAX 10

int stack[MAX];
int tail = 0;

void pop(void) {
    if (tail == 0)
        printf("Stack Underflow\n");
    else
        printf("%d\n", stack[tail-- - 1]);
}

void push(int val) {
    if (tail == MAX)
        printf("Stack Overflow\n");
    else
        stack[tail++] = val;
}

void process_stack(int n) {
    for (int i = 0; i < n; i++) {
        char cmd[32];
        scanf("%s", &cmd[0]);
        getchar();
        //printf("cmd=%s\n", cmd);
        if (strncmp(cmd, "pop", 3) == 0) {
            pop();
        } else {
            int val;
            scanf("%d", &val);
            push(val);
            getchar();
        }
    }
}

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

    process_stack(n);
    return 0;
}

Solving Approach