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

void process_stack(int n) {
    int stack[MAX];
    int top  = -1;
    char cmd[20];
    
    for(int i = 0 ;i < n; i++){
        fgets(cmd, sizeof(cmd), stdin);
        if(strncmp(cmd, "push", 4) == 0){
            int val = atoi(cmd+5);
            if(top >= MAX -1){
                printf("Stack Overflow\n");
            }else{
                stack[++top] = val; 
            }
        }
        else if(strncmp(cmd, "pop", 3) == 0){
            if(top < 0){
                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