Answer Posted / tinku

There are two differences.
First, is in the number of arguments.
Malloc() takes a single argument (memory required in bytes),
Calloc() needs two arguments.
Secondly, malloc() does not initialize the memory allocated, while
calloc() initializes the allocated memory to ZERO.


calloc() allocates a memory area, the length will be the product of its parameters. calloc fills the memory with ZERO's and returns a pointer to first byte. If it fails to locate enough space it returns a NULL pointer.
Syntax: ptr_var=(cast_type *)calloc(no_of_blocks , size_of_each_block);
i.e. ptr_var=(type *)calloc(n,s);

malloc() allocates a single block of memory of REQUSTED SIZE and returns a pointer to first byte. If it fails to locate requsted amount of memory it returns a null pointer.
Syntax: ptr_var=(cast_type *)malloc(Size_in_bytes);

What is an lvalue in c?

1122

---

What is an array? What the different types of arrays in c?

1181

---

An instruction which is analysed and acted upon by the processor prior to the compiler going its work a) directive b) constructive c) constant d) absolute mode

1084

---

What are the key features in c programming language?

1070

---

What is the difference between array and linked list in c?

1149

---

In a switch statement, what will happen if a break statement is omitted?

1059

---

I just typed in this program, and it is acting strangely. Can you see anything wrong with it?

1008

---

#include #include struct stu { int i; char j; }; union uni { int i; char j; }; void main() { int j,k; clrscr(); struct stu s; j=sizeof(s); printf("%d",j); union uni u; k=sizeof(u); printf("%d",k); getch(); } what is value of j and k.

6296

---

What is string length in c?

1080

---

Where we use clrscr in c?

1131

---

What is the mean of function?

1124

---

What is a far pointer in c?

1043

---

Can a variable be both const and volatile?

1130

---

Tell us bitwise shift operators?

1091

---

How many levels of pointers can you have?

1188

---