#include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #define MAX_SIZE 50

    int main(){
      int rcvDataSize,rcvDivSize;
      char rcvData[MAX_SIZE], rcvDiv[MAX_SIZE], CRC[MAX_SIZE];
      printf("Enter the data\n");
      scanf("%s",&rcvData);
       printf("Enter the divisor\n");
      scanf("%s",&rcvDiv);
      rcvDivSize = strlen(rcvDiv);
      rcvDataSize = strlen(rcvData);
      int i,j;
      /**************************************************CRC*************************************************/
      // initializing check_value
    for(i=0;i<rcvDivSize;i++){
        CRC[i]=rcvData[i];
        }
    do{
    // check if the first bit is 1 and calls XOR function
        if(CRC[0]=='1'){
            for(j = 1;j < rcvDivSize; j++){
    CRC[j] = ((CRC[j] == rcvDiv[j])?'0':'1');
    }
    }
// Move the bits by 1 position for the next computation
        for(j=0;j<rcvDivSize-1;j++)
            CRC[j]=CRC[j+1];
        // appending a bit from data
        CRC[j]=rcvData[i++];
    }while(i<=rcvDataSize+rcvDivSize-1);
// loop until the data ends
// Append data with check_value(CRC)
    for(i=rcvDataSize;i<rcvDataSize+rcvDivSize-1;i++){
        rcvData[i]=CRC[i-rcvDataSize];
        }
      /******************************************************************************************************/
      //print the result
      printf("CRC is: %s\n",CRC);
      printf("Final data: %s\n",rcvData);

    return 0;
    }