1. Write a function that initializes each element $$tab[i]$$ of a tab array to the value $$2^i$$.
2. Using  the first question, write a program that reads characters equal to 0 or 1 from the keyboard and calculates the number that these digits represent in binary. We can display in base 10 the result.

Example:

Enter 0 or 1 : 1
Current value : 1
Enter 0 or 1 : 0
Current value : 1
Enter 0 or 1 : 1
Current value : 5
Enter 0 or 1 : 1
Current value : 13
Enter 0 or 1 : 0
Current value : 13
Enter 0 or 1 : 1
Current value : 45
Enter 0 or 1 : 0
Current value : 45
Enter 0 or 1 : 0
Current value : 45
Enter 0 or 1 : 1
Current value : 301

#include<stdio.h>
#include<conio.h>

#define NB_MAX 20

void fill(unsigned int t[NB_MAX])
{
	int i = 1;
	t[0] = 1;
	while (i < NB_MAX)
	{
		t[i] = t[i - 1] * 2;
		i++;
	}
}

void main()
{
	char c;
	int choice, i = 0;
	unsigned int n=0;
	unsigned int t[NB_MAX];

	fill(t);

	while (1) // infinite loop
	{
		choice = 0;
		printf("Enter 0 or 1 : ");
		while (!choice)
		{
			c = getchar();
			choice = ((c == '0') || (c == '1'));
		}
		if (c == '1')
			n += t[i];
		i++;
		printf("Current value : %d\n", n);
	}
	getch();
}