計(jì)網(wǎng)實(shí)驗(yàn)LAB1 Coding on error dectecting algorithms(C++).doc

計(jì)算機(jī)通信與網(wǎng)絡(luò)實(shí)驗(yàn) 課程實(shí)驗(yàn)報(bào)告實(shí)驗(yàn)一 : LAB1 Coding on error dectecting algorithms(C+)實(shí)驗(yàn)名稱：LAB1 Coding on error dectectingalgorithms(C)1.實(shí)驗(yàn)內(nèi)容1. Cyclic redundancy checkUsing the polynomials below to encode random generated data stream (40-100bits). Show the FEC, and encoded data frame. CRC-4 x4+x+1 ITU G.704CRC-16 x16+x15+x2+1 IBM SDLCCRC-32 x32+x26+x23+.+x2+x+1ZIP, RAR, IEEE 802 LAN/FDDI, IEEE 1394, PPP-FCSFor the error patter listed below, what the conclusion does the receiver get? Can the receiver findthe errors?Case Error patternNo error 00000000One error 1000.000Two errors 100.001Random errors Random error pattern2.Parity checkUsing even or odd parity check on random generated data stream (8-20bits).Show encoded data frame.For the error patter listed below, what the conclusion does the receiver get? Can the receiver find the errors?CaseError patternNo error00000000One error1000.000Two errors100.0012.實(shí)驗(yàn)結(jié)果一、二、3.實(shí)驗(yàn)程序一、#include #include #include stdlib.hunsigned int char2int(char *str) unsigned int count=0, ret=0; for(count = 0; countstrlen(str);count+) ret = ret1; if(0 != strcount) ret+=1; return ret;unsigned int getR(char *str) unsigned int c =0 ; int ret = strlen(str)-1; for(c=0;c 1; return c;void CRC(char *scode, char *p, char*g )unsigned int iP = char2int(p);unsigned int iG = char2int(g);unsigned int r= getR(g);unsigned int code = iP = getRi(iG);) yx = yx (iG(getRi(yx) - getRi(iG);code += yx;itoa(code,scode,2);void main()char data8= , bds8=,code16=;printf(數(shù)據(jù)：);scanf(%s, data);printf(表達(dá)式：);scanf(%s, bds);CRC(code,data,bds);printf(編碼：%s,code);二、#include #include void fun(char *s) int i=0; int sum=0; for(i=0;i200;i+) sum=sum+si; if(sum+1)%2=0) printf(+1通過偶校驗(yàn)); if(sum+0)%2!=0) printf(+0通過奇校驗(yàn)); if(sum+1)%2=1) printf(+1通過奇校驗(yàn)); if(sum+0)%2=0) printf(+0通過偶校驗(yàn)); int main() printf(輸入二進(jìn)制碼：n); char