Implement Stack Using Array with Push and Pop Operations

Code

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

#define MAX 10
int tos=-1;

void push(int num,int *arr){
    if (tos == MAX-1)
        printf("Stack Overflow\n");
    else
        arr[++tos]=num;    
}

void pop(int *arr){
    if (tos==-1)
        printf("Stack Underflow\n");
    else{
        printf("%d\n",arr[tos--]);
    }
        
}

void process_stack(int n) {
    // Your logic here
    int stack[MAX]={0},num;
    for (int i=0;i<n;i++){
        char str[4]={0};
        scanf("%s",str);
        if (!strcmp(str,"push")){
            scanf("%d",&num);
            push(num,stack);
        }
        else
            pop(stack);
    }
    
}

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

    process_stack(n);
    return 0;
}

Solving Approach