Page 25 - PROGRAMMING IN C_Neat

Memory Storage:
a Variable Name

6 Value

1001 Variable Address

p Pointer Variable Name

1001 Value

2001 Pointer Variable Address
 Accessing Variable through Pointer Variable:
*p
 *p – content of pointer variable, p.

Memory Storage:
a Variable Name

6 Value

1001 Variable Address
*p
p Pointer Variable Name

1001 Value

2001 Pointer Variable Address

 Value of a is 6. Value of *p is also 6.
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2. What are the advantages of pointers? ***

Advantages of Pointers:
 Increase the program execution speed.
 Reduce the program length and complexity.
 Used to send data inside and outside a function.
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3. Explain pointers and one dimensional array. ***

Pointers and One Dimensional Array:
 a[0] is the first element of the one dimensional array, a. The address of a[0] is assigned to pointer variable,
p.
p = &a[0];

 p+1 gives the address of a[1].
p+2 gives the address of a[2].
.
.
.
p+n gives the address of a[n].