converting the binary to decimal when binary is stored in an array

Question

this is the code I have written but it gives incorrect answers and I can't figure out why

int decimal = 0;

int power= 0;

for(int i=0; i<binary.length; i++)
{
    int tmp = binary[i]%10;
    decimal+=tmp*Math.pow(2,power);
    power++
}

System.out.println(decimal);

int[] binary = [1,0,0,1,1]; The expected output is 19 but I got 25 — Emma Bell, Nov 07 '17 at 09:51

score 0 · Accepted Answer · answered Nov 07 '17 at 09:51

For arbitrary sized byte[] you can use BigInteger.

public void test(String[] args) {
    byte[] b = new byte[] {1,2,3,4,5};
    BigInteger bi = new BigInteger(b);
    System.out.println(bi.toString(10));
}

If your array is an int[] then you can convert it - see How to convert int[] to byte[].

converting the binary to decimal when binary is stored in an array

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