Creating dynamic array

    In this programm we Creating array of given size dynamically   & doing operation of insertion & deletion

 Must include header " malloc.h ".

     For better description see " C program " carefully.

                                                            C code :

 //make an array of given size dynamicaly & do oeration of insersion & deletion\  
 #include<stdio.h>  
 #include<malloc.h>  // including heder malloc.h  
 void insert(int *,int);  
 void display(int *,int);  
 void po_delete(int *,int);  
 void operation(int *,int);  
 main()  
 {  
   int *arr; // define ponter variabe of int type  
      int size,i;  
      printf("enter size of array requred : ");  
      scanf("%d",&size);  
        arr=(int *)malloc(size*sizeof(int));  // creating array of given size dynamicaly  
       printf("input elements of array \n");  
        for(i=0;i<size;i++)  
         {  
              scanf("%d",(arr+i));  
         }  
         display(arr,size);  
         operation(arr,size);  
    return 0;  
 }   
 void insert(int *arr,int size) // simply insertion   
 {  
      int i,pos,n;  
      printf("\n input number u have to insert :");  
      scanf("%d",&n);  
      printf("\n input position to at which u have to insert :");  
      scanf("%d",&pos);  
      for(i=size-1;i>=pos;i--)  
       {  
             *(arr+i)=*(arr+i-1);  
       }  
      *(arr+pos-1)=n;  
      display(arr,size);  
 }   
 void po_delete(int *arr,int size) // deletion   
 {  
      int i,pos;  
      printf("\n insert the postion of element to be deleted :");  
      scanf("%d",&pos);  
      for(i=pos;i<size;i++)  
       {  
            *(arr+i-1)=*(arr+i);  
       }  
       *(arr+size-1)=0; // last element must be vacant  
      display(arr,size);  
      operation(arr,size);  
 }   
 void display(int *arr,int size)  
 {  
       int i;  
       printf("\n data elements of array \n");  
    for(i=0;i<size;i++)  
    {  
         printf("\t%d",*(arr+i));  
    }  
 }  
 void operation(int *arr,int size)  
 {  
      int n;  
       printf("\n\tinput.... \n\t 2 for input a number at given posion \n\t 1 for delete a no from given position\n\t\t:::");  
    scanf("%d",&n);  
    switch(n)  
    {  
         case 2:  
              insert(arr,size);  
              break;  
         case 1:  
              po_delete(arr,size);  
              break;  
         default :  
              printf("u enter wrong keyword");  
              operation(arr,size);  
              break;  
    }  
 }  

OUTPUT :-