Solution.c

#include <stdio.h>
#define MAX 100

int stack[MAX];
int top = -1;

void push(int value) {
    if (top == MAX - 1) {
        printf("Stack overflow!\n");
    } else {
        stack[++top] = value;
        printf("%d pushed into the stack.\n", value);
    }
}

void pop() {
    if (top == -1) {
        printf("Stack underflow!\n");
    } else {
        printf("%d popped from the stack.\n", stack[top--]);
    }
}

void peek() {
    if (top == -1) {
        printf("Stack is empty.\n");
    } else {
        printf("Top element is: %d\n", stack[top]);
    }
}

int main() {
    int choice, value;
    do {
        printf("\n1. Push\n2. Pop\n3. Peek\n4. Exit\nEnter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
        case 1:
            printf("Enter value to push: ");
            scanf("%d", &value);
            push(value);
            break;
        case 2:
            pop();
            break;
        case 3:
            peek();
            break;
        case 4:
            printf("Exiting...\n");
            break;
        default:
            printf("Invalid choice!\n");
        }
    } while (choice != 4);

    return 0;
}