Question

C PROGRAM

the functions create and free a dynamically allocated 2D array. It should function like a statically allocated array (use malloc())

int **createArray(int rows, int cols)

parameters to this function are the number of rows and cols in the array. The return value is the array that you have dynamically allocated

void freeArray (int **array, int rows, int cols)

the parameters to this function are:

-the array created by createArray()

-the number of rows in the array

-the number of cols in the array

Answer 1

Code

#include <stdio.h>

#include <stdlib.h>

int **createArray(int rows, int cols);

void freeArray (int **array, int rows, int cols);

int main()

{

int i,j;

int **arr;//declare the array pointer

arr=createArray(3,4);//callong createArray function

for (i = 0; i < 3; i++) //print the array

{

for (j = 0; j <4; j++)

printf("%d ", arr[i][j]);

printf(" ");

}

freeArray(arr,3,4);//calling the free array function

}

int **createArray(int rows,int cols)

{

int i,j,count;

int **arr = (int **)malloc(rows * sizeof(int *));

for (i=0; i<rows; i++)

arr[i] = (int *)malloc(cols * sizeof(int));

  

  

count = 0;

for (i = 0; i < rows; i++)

for (j = 0; j < cols; j++)

arr[i][j] = ++count;

return arr;

}

void freeArray (int **array, int rows, int cols)

{

int i;

for(i = 0; i <rows ; i++)

free(array[i]);

free(array);

}

output

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