Hamming Code.cpp

/* Hamming Code */
#include<stdio.h>
#include<conio.h>
 int main ()
 {int data[20];
 int dataatrec[20],c,c1,c2,c3,i;
 printf("Enter 4bits data one by one");
 scanf("%d",&data[0]);
 scanf("%d",&data[1]);
 scanf("%d",&data[2]);
 scanf("%d",&data[4]);
 data[6]=data[0]^data[2]^data[4];
 data[5]=data[0]^data[1]^data[4];
 data[3]=data[0]^data[1]^data[2];
 printf("Encoded data is \n:");
 for(i=0;i<7;i++)
 printf("%d",data[i]);
 printf("\nEnter received data bits one by one \n");
 for(i=0;i<7;i++)
 scanf("%d",&dataatrec[i]);
 c1=dataatrec[6]^dataatrec[4]^dataatrec[2]^dataatrec[0];
 c2=dataatrec[5]^dataatrec[4]^dataatrec[1]^dataatrec[0];
 c3=dataatrec[3]^dataatrec[2]^dataatrec[1]^dataatrec[0];
 c=c3*4+c2*2+c1;
 if(c==0 &&dataatrec[6]==data[6]&&dataatrec[5]==data[5]&&dataatrec[3]==data[3])
  {printf("\nNo error while transmit the data");
  }
  else { printf("\n on possitio %d", c);
  printf("\n data sent ");
  for(i=0;i<7;i++)
  printf("%d",dataatrec[i]);
  printf("\n correct message is");
  if(dataatrec[7-c]==0)
  dataatrec[7-c]=1;
  else
    dataatrec[7-c]=0;
    for(i=0;i<7;i++)
    {
		printf("%d", data[i]);
	}
	
  }
  return 0;
  getch();
 }