double pointer exercise program ( visual studio 2019 )

double_pointer_exercise.cpp

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>   

int main()
{
	unsigned n;
	scanf("%u", &n);

	char* str = (char*)malloc(sizeof(char) * (n + 1));
	scanf_s("%s", str, n + 1);

	char** arrs = (char**)malloc(sizeof(char*) * (n + 1));
	for (int i = 0; i <= n; ++i)
	{
		arrs[i] = (char*)malloc(sizeof(char) * (i + 1));
		arrs[i][i] = '\0';

		for (int j = 0; j < i; ++j)
			arrs[i][j] = str[j];
	}

	for (int i = 0; i <= n; ++i)
	{
		printf("%s\n", arrs[i]);
	}

	for (int i = 0; i <= n; ++i)
		free(arrs[i]);
	free(arrs);
	free(str);
	return 0;
}