6. Using free) Consider the following code which creates a 2D array. It first cr
ID: 3884293 • Letter: 6
Question
6. Using free) Consider the following code which creates a 2D array. It first creates an "outer array" of character pointers, and then for each pointer in the outer array it creates an "inner array" of characters. //The implies that the variable is a pointer to a pointer //That is, this variable stores the address of a character pointer. char *ppArrayofPointers ppArrayOfPointers- (char )malloc(5 sizeof (char)); //If malloc fails (e.g. there is not enough memory) then it returns NULL //If so we print an error message and quit if (ppArray0fPointers-= NULL) perror ("malloc error") exit(1) int i; for (i-0; iExplanation / Answer
Dear Student,
here is the complete c program which free the memory allocated by the pointer.
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Note: Please note that the below program has been tested on ubuntu 16.04 system and compiled under gcc compiler. This code will also work on other IDE's.
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Program:
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#include<stdio.h>
#include<stdlib.h>
int main()
{
char **ppArrayOfPointers;
ppArrayOfPointers = (char**)malloc(5*sizeof(char*));
if(ppArrayOfPointers == NULL)
{
perror("malloc error");
exit(1);
}
int i;
for(i=0;i<5;i++)
{
ppArrayOfPointers[i] = (char*)malloc(3*sizeof(char));
}
if(ppArrayOfPointers[i] == NULL)
{
perror("malloc error");
exit(1);
}
//this statement will free the memory allocated by the pointers
free(ppArrayOfPointers);
return 0;
}
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Note: The program will successfully compiled without throwing any error and warning message, it means the memory has been successfully allocated for the pointer and and finally memory has been freed.
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Kindly Check and Verify Thanks..!!!
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