Implement Stack Using Array with Push and Pop Operations

Code

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

#define MAX 10

int stack[MAX];
int top = -1;

/* Push operation */
void push(int x) {
    if (top == MAX - 1) {
        printf("Stack Overflow\n");
    } else {
        stack[++top] = x;
    }
} 

/* Pop operation */
void pop(void) {
    if (top == -1) {
        printf("Stack Underflow\n");
    } else {
        printf("%d\n", stack[top--]);
    }
}

/* Process stack operations */
void process_stack(int n) {
    char op[10];
    int value;

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

        if (strcmp(op, "push") == 0) {
            scanf("%d", &value);
            push(value);
        } 
        else if (strcmp(op, "pop") == 0) {
            pop();
        }
    }
}

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

    process_stack(n);
    return 0;
}

Solving Approach