Added new array operation

array/array_operations.c

@@ -1,71 +1,85 @@
 #include<stdio.h>
 #include<stdlib.h>
 int a[100], n, elem, i, pos;
+
 void create() 
 {
 printf("\nEnter the size of the array elements: ");
 scanf("%d", &n);
 printf("\nEnter the elements for the array:\n");
 for(i=0; i<n; i++)
-scanf("%d", &a[i]);
+    scanf("%d", &a[i]);
 } 
+
 void display() 
 {
 int i;
 printf("\nThe array elements are:\n");
 for(i=0; i<n; i++)
-{
-printf("%d\t", a[i]);
-}
+    printf("%d\t", a[i]);
 } 
+
 void insert() 
 {
 printf("\nEnter the position for the new element: ");
 scanf("%d", &pos);
 printf("\nEnter the element to be inserted: ");
 scanf("%d", &elem);
-for(i=n-1; i>=pos; i--)
+for(i=n-1; i>= (pos - 1); i--)
+    a[i+1] = a[i];
+a[pos - 1] = elem;
+n = n+1;
+}
+
+void update() 
 {
-a[i+1] = a[i];
+printf("\nEnter the position for updating element: ");
+scanf("%d", &pos);
+printf("\nEnter new element: ");
+scanf("%d", &elem);
+a[pos - 1] = elem;
 }
-a[pos] = elem;
-n = n+1;
-} 
+
 void del()
 {
 printf("\nEnter the position of the element to be deleted: ");
 scanf("%d", &pos);
 elem = a[pos];
-for(i=pos; i<n-1; i++)
-{
-a[i] = a[i+1];
-}
+for(i=pos - 1; i<n-1; i++)
+    a[i] = a[i+1];
 n = n-1;
 printf("\nThe deleted element is = %d", elem);
 }
-void main()
-{
-int ch;
-do{
-printf("\n\n--------Menu-----------\n");
-printf("1.Create\n 2.Display\n 3.Insert\n 4.Delete\n 5.Exit\n");
-printf("-------------------------------");
-printf("\nEnter your choice: ");
-scanf("%d", &ch);
-switch(ch)
+
+int main()
 {
-case 1: create();
-break;
-case 2: display();
-break;
-case 3: insert();
-break;
-case 4: del();
-break;
-case 5: exit(0);
-break;
-default: printf("\nInvalid choice:\n");
- break;
-}
- }while(ch!=5);
+    int ch;
+    do
+    {
+        printf("\n\n--------Menu-----------\n");
+        printf(" 1. Create\n 2. Display\n 3. Insert\n 4. Update\n 5. Delete\n 6. Exit\n");
+        printf("-------------------------------");
+        printf("\nEnter your choice: ");
+        scanf("%d", &ch);
+        switch(ch)
+        {
+            case 1: create();
+                    break;
+            case 2: display();
+                    break;
+            case 3: insert();
+                    break;
+            case 4: update();
+                    break;
+            case 5: del();
+                    break;
+            case 6: exit(0);
+                    break;
+            default: printf("\nInvalid choice:\n");
+                     break;
+        }
+ }
+
+while(ch!=6);
+
 }