88. Implement Stack Using Array with Push and Pop Operations

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

#define MAX 10

void process_stack(int n) {
    int stack[MAX] = {0}, pos = -1, val = 0;
    char cmd[10];
    for(int i = 0; i < n; i++){
        scanf("%s", cmd);
        if(!strcmp(cmd, "push")){
            scanf("%d", &val);
            if(pos >= MAX-1){
                printf("Stack Overflow\n");
            }else{
                stack[++pos] = val;
            }
        }else if(!strcmp(cmd, "pop")){
            if(pos == -1){
                printf("Stack Underflow\n");
            }else{
                printf("%d\n", stack[pos--]);
            }
        }
    }
}

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

    process_stack(n);
    return 0;
}