converting Binary Numbers in to decimal numbers

Question

I need a program to convert Binary numbers into Decimal number in Java or in C++.

is there some one who can help me.

Answer 1

Use binary expansion. For example 1101 1001 is:

(1 x 2^7) + (1 x 2^6) + (1 x 2^4) + (1 x 2^3) + (1 x 2^0)

which is equal to:

217 in decimal.

Here is the algorithm:

1.) Prompt the user for a binary number.

2.) Store the number in an array. The first element i.e. anArray[0] should contain a value of 1, the second element should have a value of 0 . . .

3.) Implement a for loop to do the calculation.