CRC16-CCITT.rar_CCITT_CCITT CRC16_CRC16_CRC16-CCITT_crc-16/ccitt

#include <iostream.h> #include <stdio.h> #include <stdlib.h> //#include <conio.h> char main (void) { int *x; int n=0; x=(int*)malloc(sizeof(int)); while(1) { scanf("%x",&x[n]); printf("n=%d value=%x\n",n+1,x[n]); n++; x=(int*)realloc(x,sizeof(int)*(n+1)); unsigned short wCrc; unsigned short wCrcHigh; unsigned short wCrcLow; int i=0,j=0; int result; //---------------------CRC-CCITT-------------------// wCrc=0; //初始值=0 for (i=0;i<n;i++) { wCrc^=(x[i]<<=8); //将结果wCrc与数组中的第i个值进行异或 for(j=0; j<8; j++) { if((wCrc&0x8000)!=0) //判断异或后的结果首位是否为0 { wCrc<<=1; //若首位=1，则左移一位，并与多项式进行异或 wCrc^=0x1021; //多项式=11021,按照要求，省略最左面的1 } else wCrc<<=1; //若首位不等于1，直接左移一位 } } result=wCrc; wCrcHigh=(int)wCrc/256; wCrcLow=(int)wCrc%256; cout<<"The CRC result is:"<<hex<<result<<endl; cout<<"The CRC Hignbyte result is:"<<hex<<wCrcHigh<<endl; cout<<"The CRC Lowbyte result is:"<<hex<<wCrcLow<<endl; } getchar(); return 0; }