Hello ,

i have read the manual page of alloca ,
it is documented there that "alloca works similar to the malloc but it allocates memory from stack and frees automatically".

i can't get how can i use that in a program .
if i'm not wrong can i use that like :

#include<stdio.h>
#include<alloca.h>
int main()
{
        void *p;
        p=alloca(20);
        if(p==NULL)
        {
                printf("alloca failed");
                exit(1);
        }
 
        strcpy(p,"Hello");
        printf("%s\n",p);
        printf("%u\n",p);
 
        return 0;
}