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) {
    int stack[MAX];
    int top = -1;    // con trỏ đỉnh stack
    char command[20];
    int value;

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

        if (strcmp(command, "push") == 0) {
            scanf("%d", &value);

            if (top == MAX - 1) {
                printf("Stack Overflow\n");
            } else {
                stack[++top] = value;
            }
        } 
        else if (strcmp(command, "pop") == 0) {
            if (top == -1) {
                printf("Stack Underflow\n");
            } else {
                printf("%d\n", stack[top--]);
            }
        }
    }
}

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

    process_stack(n);
    return 0;
}

Solving Approach