pit1.c

#include <stdio.h>
#include <stdlib.h>
void allocate (int **p,int value){
	if (*p != NULL){
		printf("\nmemoory is not free");
		free(*p);
	}
	
	*p= malloc(sizeof(int));
	if (*p ==NULL){
		printf("\nmemory can't be allocated");
		return 
	}
	**p = value;
}
int main(){
	int *ptr =NULL;
	allocate(&ptr,24);
	printf("\nthe vaule of the %p\n",(void*)ptr);
	printf("\nthe value of the ptr %d\n", *ptr);
	printf("\nthe value of the %p\n ",(void*)&ptr);
	free(ptr);
	ptr= NULL;
	allocate(&ptr,35);
        printf("\nthe vaule of the %p\n",(void*)ptr);
        printf("\nthe value of the ptr %d\n", *ptr);
        printf("\nthe value of the %p\n ",(void*)&ptr);
        free(ptr);
        ptr= NULL;
	return 0;
}