Array.c

#include <stdio.h>
#include <stdlib.h>

int del(int *, int);
int insert(int *, int);
int main()
{
	int a[50], i, n, ch;

	printf("Enter the no of Elements(n):\n");
	scanf("%d", &n);
	printf("Enter the Elements:\n ");
	for (i = 0; i < n; i++)
		scanf("%d", &a[i]);
	printf("Array is:\n");
	for (i = 0; i < n; i++)
		printf("%d  ", a[i]);

	printf("\nMenu\n1.Insert an element\n2.Delete an Element\n3.exit");
	while (1)
	{
		printf("\nEnter your choice:\n");
		scanf("%d", &ch);
		switch (ch)
		{
		case 1:
			n = insert(a, n);
			printf("After Insertion:\nArray:\n");
			for (i = 0; i < n; i++)
				printf("%d  ", a[i]);
			break;
		case 2:
			n = del(a, n);
			printf("After Deletion:\nArray:\n");
			for (i = 0; i < n; i++)
				printf("%d  ", a[i]);
			break;
		case 3:
			exit(0);
		default:
			printf("Incorrect Choice....!!");
		}
	}
}
int insert(int *p, int n)
{
	int i, k;
	int item;
	if (n == 50)
	{
		printf("\nError:Overflow..!!");
		exit(0);
	}
	printf("Enter the index no of the Element:\n");
	scanf("%d", &k);
	if (k < 0 || k > n)
	{
		printf("\nError:Index is not valid...!!");
		exit(0);
	}
	printf("Enter the value you want to insert:");
	scanf("%d", &item);
	for (i = n; i >= k; i--)
	{
		*(p + i + 1) = *(p + i);
	}
	*(p + k) = item;
	return n = n + 1;
}
int del(int *p, int n)
{
	int i, k;
	int item;
	if (n == 0)
	{
		printf("\nError:Underflow..!!");
		exit(0);
	}
	printf("Enter the index no of the Element:\n");
	scanf("%d", &k);
	if (k < 0 || k > n)
	{
		printf("\nError:Index is not valid...!!");
		exit(0);
	}
	for (i = k; i < n; i++)
	{
		*(p + i) = *(p + i + 1);
	}
	return n = n - 1;
}