CS106 B Stanford arryay exercise.

[ccie007]

I am trying to do this exericse.I am not sure whether i did the exercise according to what the exercise is asking me to do.I think i did what the exercise wants.Could u check it for me please guys?

here is the exercise:

Write a function IndexArray(n) that returns a pointer to a dynamically allocated integer array with n elements, each of which is initialized to its own index. For example, assuming that ip is declared as
int *ip;
the statement
ip = IndexArray(10);
should produce the following memory configuration:

ip---->[0][1][2][3][4][5][6][7][8][9]
[

my code

#include <iostream>
#include <iomanip>
#include <cstdio>
#include <stdlib.h>
#include "genlib.h"
#include <simpio.h>




void indexArray(int n);

int main(){

	
	


	indexArray(10);



}

//a function to return the pointer of the array

void indexArray(int n){
   
	int result=0;
	
	int *p;
	
	p= new int[n];
	
	

	
	cout<<&p;
	

}

[Intrexa]

Close.

You never return the pointer. You allocate it, then as you leave the function, you lose access to it, so it becomes leaked memory. indexArray(int) needs to return a pointer to an int, and you need to assign that address to a variable in main.

Also, you need to set the values of the ints in the array, using a loop.

[ccie007]

Oh i see.I will try that

[ccie007]

Have i done right this time?

I guess so.

/**
 * File: narcissism.cpp
 * --------------------
 * This file defines a program that prints out
 * the first 25 narcissistic numbers.
 */

#include <iostream>
#include <iomanip>
#include <cstdio>
#include <stdlib.h>
#include "genlib.h"
#include <simpio.h>




int** indexArray(int n);

int main(){

	int** pointer=0;
	


	pointer=indexArray(10);
	
	cout<<pointer;
	



}

//put the double aestriks after int is bcoz it was complaining ""
int** indexArray(int n){
  
	
	int *p;
	int **p2;
	
	p= new int[n];
	
	//setting values in the array
	
	for(int i=0;i<n;i++){
	
		p[i]=i;
	
	
	}
	
    p2=&p;

	
	return p2;
	

	 // return result;
}