Implement Stack Using Array with Push and Pop Operations

Code

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

#define MAX 10
char stack[MAX][5] = {0};

void process_stack(int n) {
    int pos = 0;
    while (n--) {
        char cmd[100];
        fgets(cmd, sizeof(cmd), stdin);
        if (!strncmp(cmd, "push", 4)) {
            if (pos >= MAX) {
                printf("Stack Overflow\n");
            } else {
                char *c = cmd;
                char *p = stack[pos++];
                while (*c++ != ' ');
                while (*c)
                    *p++ = *c++;
                *p = '\0';
            }
        } else if (!strncmp(cmd, "pop", 3)) {
            if (pos <= 0) {
                printf("Stack Underflow\n");
            } else {
                printf("%s", stack[--pos]);
            }
        }
    }
}

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

    process_stack(n);
    return 0;
}

Solving Approach