Answer / vignesh1988i

ya, this is the above syntax for malloc function........

ya i will clearly explain ,

let us take a small block of coding , here my aim is to get 'n' numbers and print the 'n' numbers ......

#include<alloc.h>
void main()
{
int n ,*pointer;
clrscr();
printf("enter the number of elements u r going to enter :");
scanf("%d",&n);
pointer=(int *)malloc(n*sizeof(int));


the above statement states that : , this function is requesting the OPERATING SYSTEM to allocate 'n' amount of memory of a data type integer. and since the return format of the malloc function is an address , so we are type casting as (int*)before malloc , and the returned starting address will be stored in the pointer variable (pointer) ..
this 'pointer' will have the starting address of the allocated memory dynamically...
that's all..

for(int i=0;i<n;i++)
{
scanf("%d",(pointer+i));
}
for(i=0;i<n;i++)
printf("%d\n",*(pointer+i));
getch();
}


thank u

Answer / pramod

I'll add few more lines to answer above just to make it a
bit more understandable.


Malloc allocates consequetive blocks of memory of requested
size.Then it returns the starting address of this block ,
the address returned is of type void , since it is a void
pointer so we need to typecast it to one that we requested
so typecasting is done( This headache has been removed in
C++ by using new as new automatically does this typecasting)

What is the difference between strcpy() and memcpy() function in c programming?

0 Answers  

---

C program to find frequency of each character in a text file?

6 Answers  

---

Explain the importance and use of each component of this string: Foo.Bar, Version=2.0.205.0, Culture=neutral, PublicKeyToken=593777ae2d274679d

1 Answers   TCS,

---

what is the diffrenet bettwen HTTP and internet protocol

0 Answers  

---

Array is an lvalue or not?

0 Answers  

---

Explain what could possibly be the problem if a valid function name such as tolower() is being reported by the c compiler as undefined?

0 Answers  

---

regarding the scope of the varibles;identify the incorrect statement: a.automatic variables are automatically initialised to 0 b.static variables are are automatically initialised to 0 c.the address of a register variable is not accessiable d.static variables cannot be initialised with any expression

1 Answers   TCS,

---

A stack can be implemented only using array?if not what is used?

3 Answers   InterGlobal,

---

What is the benefit of using an enum rather than a #define constant?

0 Answers  

---

post new interiew question and aptitude test papers

1 Answers  

---

all c language question

0 Answers   Wipro,

---

#include<stdio.h> #include<conio.h> void main() { char ch='\356'; printf("%d",ch); } o/p=-18 why?plz.explain

2 Answers  

---