Asp.net Declare a Pointer
Type * var-name ;type is the pointer’s referent type.var-name is the name of the pointer variable.example. To declare ip to be a pointer as like int.
int* ip;
If you come from a C/C++ background, then you need to be aware of an important difference between the way C# and C/C++ declare pointers in asp.net programming .
int* ip;
If you come from a C/C++ background, then you need to be aware of an important difference between the way C# and C/C++ declare pointers in asp.net programming .
Example of Declare a Pointer:
using System;
class myclass
{
unsafe static void Inc(int* p)
{
//++
*p=*p+1;
}
public static void Main()
{
int i = 1;
unsafe
{
Inc(&i);
}
//print the i
Console.WriteLine(i);
}
}
in this example we make a class 'myclass' and a function inc which takes one argument p which is a pointer type .in this function we increasing value of p by arthritic operation.
by doing the operation on pointer.
using System is a name space .public static void main is a main function where the program start execution.
When program run then, you'll see 2 printed on screen. because you have passed the address of the
variable i to the function Increment. Variable i is create on the stack. &i gives address on the stack. Thus when within the function Inc, p is pointing to i's address. Thus when we increment by 1 to *p(pointer p) we are really increment i;
class mtpointerclass
{public static void Main()
{pointerclass pc=new pointerclass();
pc.Method();
}
}
Second Example :
using System;class pointerclass
{public void Method()
{{int x = 10; //x is a variableint y = 20; //declare y as a variable int *ptr = &x; //ptr is a pointer variable int *prt = &y; //prt same as ptr.
Console.WriteLine(ptr);
Console.WriteLine(
Console.WriteLine(prt);
Console.WriteLine(*ptr);
Console.WriteLine(*prt);
}
}
Console.WriteLine(*ptr);
Console.WriteLine(*prt);
}
}
{public static void Main() //main function
{
pointerclass pc =
{
pointerclass pc = new pointerclass(); //make the object of pointerclass
pc.Method();
}
}
{public void Method()
{{int x = 10; //x is a variableint y = 20; //declare y as a variable int *ptr = &x; //ptr is a pointer variable int *prt = &y; //prt same as ptr.
Console.WriteLine(ptr);
Console.WriteLine(
Console.WriteLine(prt);
Console.WriteLine(*ptr);
Console.WriteLine(*prt);
}
}
Console.WriteLine(*ptr);
Console.WriteLine(*prt);
}
}
{public static void Main() //main function
{
pointerclass pc =
{
pointerclass pc = new pointerclass(); //make the object of pointerclass
pc.Method();
}
}
//make an other class -----------------------------------------------------class MypointerClass // main class.
In asp.net with C# programming array elements can be accessed by using pointer(memory address) notations.we know that array has primary address at [0] index .
// Example with array :-using System;class pointerclass
{public void Method()
{int []iArray = new int[10];for(int count=0; count < 10; count++)
{
iArray[count] = count*count;
}fixed(int *ptr = iArray)
Display(ptr);
}public void Display(int *prt)
{for(int i=0; i < 14;i++)
{
Console.WriteLine(*(prt+i));
}
}
}
// Example with array :-using System;class pointerclass
{public void Method()
{int []iArray = new int[10];for(int count=0; count < 10; count++)
{
iArray[count] = count*count;
}fixed(int *ptr = iArray)
Display(ptr);
}public void Display(int *prt)
{for(int i=0; i < 14;i++)
{
Console.WriteLine(*(prt+i));
}
}
}
class mtpointerclass
{public static void Main()
{pointerclass pc=new pointerclass();
pc.Method();
}
}
Unsafe code in asp.net programming?
