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 buffer[MAX];
    int head = 0;
    int count = 0;

    char cmd[20];
    int x;

    while (n--) {
        fgets(cmd, sizeof(cmd), stdin);

        if (strncmp(cmd, "push", 4) == 0) {
            sscanf(cmd, "push %d", &x);

            if (count == MAX) {
                printf("Stack Overflow\n");
            } else {
                buffer[head] = x;
                head = (head + 1) % MAX;
                count++;
            }
        }
        else if (strncmp(cmd, "pop", 3) == 0) {
            if (count == 0) {
                printf("Stack Underflow\n");
            } else {
                head = (head - 1 + MAX) % MAX;
                printf("%d\n", buffer[head]);
                count--;
            }
        }
    }

}

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

    process_stack(n);
    return 0;
}

Solving Approach