passing 2d array to function using pointers in c - c

Question

this is first time I've had to ask a question here usually don't need but this time i just can't figure it out.
Basically i'm trying to create a grid in the console of 1s and 0s (1s and 0s in random places). the 1s being wood chips and 0s representing blank space.
to do this i have to use this function which initializes and populates a 2d array and returns the pointer to the finished array
int* createEnvironment(int width, int height, int numWoodChips)
i then then need to print the 2d array using this function
void printEvrionment(int* environment, int width, int height)
this is what i have so far
int enviroWidth = 20;
int enviroHeight = 20;
int* createEnvironment(int width, int height, int numWoodChips);
void printEvrionment(int* environment, int width, int height);
void freeArray(int width, int* environment);
int main(int argc, char **argv)
{
int *arr = createEnvironment(enviroWidth, enviroHeight, 10);
printEvrionment(arr, enviroWidth, enviroHeight);
getchar();
freeArray(enviroHeight, arr);
return 0;
}
int* createEnvironment(int width, int height, int numWoodChips)
{
int Num = 1;
/*randNum = (rand() % 1) + 0;*/
int temp = 3;
int woodChipCounter = 0;
int counter = 0;
int *array;
array = malloc(sizeof(array)*height *width);
for (int j = 0; j < height; j++)
{
for (int i = 0; i < width; i++)
{
counter++;
if (counter == temp)
{
array[j*width + i] = 1;
temp++;
woodChipCounter++;
counter = 0;
}
else
{
array[j*width + i] = 0;
}
if (woodChipCounter == numWoodChips)
{
Num = 0;
}
}
}
return array;
}
void printEvrionment(int* environment, int width, int height)
{
for (int j = 0; j < height; j++)
{
printf("\n");
for (int i = 0; i < width; i++)
{
printf("%d", environment[j]);
}
}
}
void freeArray(int height, int* environment)
{
for (int i = 0; i < height; i++)
{
free(environment[i]);
}
free(environment);
}

Answer 1

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
int enviroWidth = 20;
int enviroHeight = 20;
char *createEnvironment(int width, int height, int numWoodChips);
void printEvrionment(char *environment, int width, int height);
//void freeArray(int width, int* environment);
int main(int argc, char **argv){
char *arr = createEnvironment(enviroWidth, enviroHeight, 10);
printEvrionment(arr, enviroWidth, enviroHeight);
getchar();
//freeArray(enviroHeight, arr);
free(arr);
return 0;
}
char *createEnvironment(int width, int height, int numWoodChips){
srand(time(NULL));
int len = width * height;
char *array = malloc(len);
if(numWoodChips > len)
numWoodChips = len;
memset(array, '1', numWoodChips);
memset(array + numWoodChips, '0', len - numWoodChips);
for(int i=0;i<numWoodChips; ++i){
char tmp;
int pos = rand()%len;
//swap array[i] and array[pos]
tmp = array[i];
array[i] = array[pos];
array[pos] = tmp;
}
return array;
}
void printEvrionment(char *environment, int width, int height){
printf("\n");
for (int j = 0; j < height; ++j){
for (int i = 0; i < width; ++i){
printf("%c", environment[width * j + i]);
}
printf("\n");
}
}