q6

//program 1 crashes because no memory allocated at arr[index]

void setArr (int index, int v){
int i = v;
arr[index] = (int*)malloc(sizeof(int));//memory allocation required
*(arr[index] )= i;
}

program 2: gives wrong output because it store address of local declared and initialize value i;

corrected program(Arr3.c)

#include <stdio.h>
#include<stdlib.h>
void setArr (int, int);

int * arr[10]; // array of 10 int pointers, global variable

int main(int argc, char *argv[])
{
int i;

setArr(0, 0);
setArr(1, 100);
setArr(2, 200);
setArr(3, 300);
setArr(4, 400);

for(i=0; i<5;i++)
printf("arr[%d] -*-> %d\n", i, *arr[i]); /* should be 0, 100, 200, 300, 400 */

return 0;
}

/* set arr[index], which is a pointer, to point to an integer of value v */
void setArr (int index, int v){
int i = v;
arr[index] = (int*)malloc(sizeof(int));//memory allocation required
*(arr[index] )= i;
}