Calloc () function in C

The function void * calloc (so-phan-tu, kich-co-phan-tu) allocates the requested memory and returns a pointer to it. The difference between malloc and calloc is: malloc does not set memory to 0 while calloc sets the allocated memory to 0.

Declaring the function calloc () in C

Here is the declaration for calloc () in C:

 void * calloc ( so - phan - tu ,  kich - co - phan - tu ) 

Parameters

so-phan-tu : This is the number of elements to be allocated.

kich-co-phan-tu : This is the size of the element.

Returns the value

This function returns a pointer to the allocated memory, or returns NULL if the request fails.

For example

The following C program illustrates the usage of calloc () in C:

 #include #include int  main () { int  i ,  n ; int * a ;  printf ( "Nhap so phan tu: n" );  scanf ( "%d" ,& n );  a  = ( int *) calloc ( n , sizeof ( int ));  printf ( "Nhap %d so: n" , n ); for (  i = 0 ;  i  <  n  ;  i ++ ) {  scanf ( "%d" ,& a [ i ]); }  printf ( "Cac so vua nhap la: n" ); for (  i = 0 ;  i  <  n  ;  i ++ ) {  printf ( "%d " , a [ i ]); } return ( 0 ); } 

Compiling and running the above C program will result:

According to Tutorialspoint

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