Implement Stack Using Array with Push and Pop Operations

Code

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

#define MAX 10
typedef struct{
    int buffer[MAX]={0};
    int head;
}stack;
void process_stack(int n) {
    // Your logic here
    stack buf;
    char command[5];
    buf.head=0;
    for(int i=0;i<n;i++){
        scanf("%s",command);
        if(strncmp(command,"push",4)==0){
            int num;
            scanf("%d",&num);
            if(buf.head<MAX)
                buf.buffer[buf.head++]=num;
            else
                printf("Stack Overflow\n");
        }else if(strncmp(command,"pop",3)==0){
            int val;
            if(buf.head>0){
                val=buf.buffer[--(buf.head)];
                printf("%d\n",val);
            }else 
                printf("Stack Underflow\n");
        }
    }
}

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

    process_stack(n);
    return 0;
}

Solving Approach