C Programming - Pointers - Discussion

Online complier great, can somebody tell me what are the prerequisite for making online complier.

Here we have to allocate space for characters.so first we have to do typecasting i.e (char *).

If we give (char) it gives error because we are using pointer, then we allocate memory space by malloc().

Because pointer indicate the address and point out that point. So the char*p indicate that point p.

Since we know that decleration+initialization=can we write.

Can we write this program like.

char p;
p= (char *) malloc (1000) ;

Here we have to allocate space for characters. So first we have to do typecasting i.e. (char *).

If we give (char) it gives error because we are using pointer, then we allocate memory space by malloc().

Thanks mahesh and kavaya.

Thanks to all for discussion. But one think *P and pointer without star, both are different one store value and other store address then how you combine?

malloc() function in c is used for allocating memory.

Following is the simple program using malloc function.

#include<stdio.h> /* For standard input output */
#include<malloc.h> /* You need this if on UNIX or LINUX */


int main()
{
char words[]={" this is a simple example for malloc\n"};
char *p; /* char pointer for use with malloc() */

p = (char *)malloc(sizeof(words)); /* Explained in the following text */
printf("words = %s\n",words);

return(0);
}

Pointer returns the address of the located position in the memory...and malloc fun too returns the pointer of the space allocated..
i.e

char *p = (*char) malloc(---);