Checksum in C

This program is for implementing Checksum Method. This is a part of Mumbai University MCA Colleges Data Communication and Networking MCA Sem 4

#include<stdio.h>

#include<conio.h>

int add(int,int);

int com(int);

void main()

{

 int i,j,dl,dil;

 int data1[10],data2[10],newdata[10],comp[10],checksum[10];

 clrscr();

 printf("\n Enter the data length=");

 scanf("%d",&dl);

 printf("\n Enter the data1 : \n");

 for(i=0;i<dl;i++)

  scanf("%d",&data1[i]);

  printf("\n Enter the data2 : \n");

 for(i=0;i<dl;i++)

  scanf("%d",&data2[i]);

            for(i=dl-1;i>=0;i--)

            {

            newdata[i]=add(data1[i],data2[i]);

            }

 printf("\n\n Data 1        : ");

 for(i=0;i<dl;i++)

            printf("%d",data1[i]);

 printf("\n Data 2        : ");

 for(i=0;i<dl;i++)

            printf("%d",data2[i]);

 printf("\n\n The new data is : ");

 for(i=0;i<dl;i++)

 {

   printf("%d",newdata[i]);

 }

  printf("\n Checksum : ");

 for(i=0;i<dl;i++)

 {

   checksum[i]=com(newdata[i]);

   printf("%d",checksum[i]);

 }

 printf("\n\n Receiver Side : \n");

 printf("\n Data : ");

  for(i=0;i<dl;i++)

  printf("%d",data1[i]);printf(" ");

   for(i=0;i<dl;i++)

  printf("%d",data2[i]);printf(" ");

   for(i=0;i<dl;i++)

  printf("%d",checksum[i]);

  printf("\n Addition : ");

  for(i=dl-1;i>=0;i--)

            {

            newdata[i]=add(newdata[i],checksum[i]);

            }

  for(i=0;i<dl;i++)

  {

   printf("%d",newdata[i]);

  }

  printf("\n  Compliment : ");

  for(i=0;i<dl;i++)

  {

   comp[i]=com(newdata[i]);

   printf("%d",comp[i]);

  }

 getch();

}

int add(int x, int y)

{

static int carry=0;

 if(x==1 && y==1 && carry==0)

 {

 carry=1;

  return 0;

 }

 else if(x==1 && y==1 && carry==1)

 {

 carry=1;

 return 1;

 }

 else if(x==1 && y==0 && carry==0)

  {

  carry=0;

  return 1;

  }

  else if(x==1 && y==0 && carry==1)

  {

  carry=1;

  return 0;

  }

   else if(x==0 && y==1 && carry==0)

  {

  carry=0;

  return 1;

  }

  else if(x==0 && y==1 && carry==1)

  {

  carry=1;

  return 0;

  }

  else if(x==0 && y==0 && carry==0)

  {

  carry=0;

  return 0;

  }

  else

  {

  carry=0;

  return 1;

  }

}

int com(int a)

{

if(a==0)

return 1;

else

return 0;

}

Hope this Program is useful to you in some sense or other. Keep on following this blog for more Mumbai University MCA College Programs. Happy Programming and Studying.