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Hamming Code Implementation in C+
//Post at : https://medium.com/code01/hamming-code-implementation-in-c-c16f3d038ba1
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
using namespace std;
int
main ()
{
int a, b, c[30], d, r = 0, d1; //Max bits here i kept is 30
cout << " Enter the No of Data Bits you want to Enter : ";
cin >> a;
while (a + r + 1 > pow (2, r))
{
r++;
}
cout << "No of data bits to be added " << r << " : Total Bits :" << a +
r << endl;
cout << " Enter the Data Bits One by One :" << endl;
for (int i = 1; i <= a; ++i)
cin >> c[i];
cout << endl << " Data bits entered : ";
for (int i = 1; i <= a; ++i)
cout << c[i] << " ";
cout << endl;
int data[a + r];
d = 0;
d1 = 1;
for (int i = 1; i <= a + r; ++i)
{
if ((i) == pow (2, d))
{
data[i] = 0;
++d;
}
else
{
data[i] = c[d1];
++d1;
}
}
cout << " Data Bits are Encoded with Parity bits(0): ";
for (int i = 1; i <= a + r; ++i)
cout << data[i] << " ";
d1 = 0;
int min, max = 0, parity, s, j;
/*Parity Bit Calculation */
for (int i = 1; i <= a + r; i = pow (2, d1))
{
++d1;
parity = 0;
j = i;
s = i;
min = 1;
max = i;
for (j; j <= a + r;)
{
for (s = j; max >= min && s <= a + r; ++min, ++s)
{
if (data[s] == 1)
parity++;
}
j = s + i;
min = 1;
}
if (parity % 2 == 0) // Even Parity
{
data[i] = 0;
}
else
{
data[i] = 1;
}
}
cout << endl << " Hamming codeword bits for even parity are : ";
for (int i = 1; i <= a + r; ++i)
cout << data[i] << " ";
cout << endl << endl;
}
//End
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