曼彻斯特编码、解码

#include<stdio.h> #include<iostream.h> #include<string.h> const int size=10; void Display() { cout<<"\nselect what you want to do:"<<endl; cout<<"0.Exit"; cout<<"1.Manchester encoding."<<endl; cout<<"2.Differential Manchester encoding."<<endl; cout<<"3.Translate the Manchester code into original one."<<endl; cout<<"4.Translate the Differential Manchester code into original one."<<endl; } /*void Encipher_M(char code[]) //Manchester Encoding { int i,len; len=strlen(code); cout<<"the Manchester code is: "; for(i=0;i<len;i++) { if(code[i]=='1') cout<<"10"; else cout<<"01"; } cout<<endl; } void Encipher_DM(char code[]) //Differential Manchester Encoding { int i,len,a[2*size]; len=strlen(code); cout<<"the Differential Manchester code is: "; if(code[0]=='1') { a[0]=1; a[1]=0; } else { a[0]=0; a[1]=1; } for(i=1;i<len;i++) { if(code[i]=='0') if(a[2*i-1]==0){ a[2*i]=1; a[2*i+1]=0; } else{ a[2*i]=0; a[2*i+1]=1; } else if(a[2*i-1]==0){ a[2*i]=0; a[2*i+1]=1; } else{ a[2*i]=1; a[2*i+1]=0; }; } for(i=0;i<2*len;i++) cout<<a[i]; cout<<endl; }*/ void Decipher_M(char code[]) //translate the Manchester code to original one. { int i,len,a[size]; len=strlen(code); while(len%2) { cout<<"the Manchester code input is wrong.please input again:"<<endl; cin>>code; len=strlen(code); } while(len>size*2) { cout<<"the code input is beyond length limit.please input again:"<<endl; cin>>code; len=strlen(code); } for(i=0;i<len;i+=2) { if(code[i]=='0'&&code[i+1]=='1') { a[i/2]=0; } else if(code[i]=='1'&&code[i+1]=='0') { a[i/2]=1; } else { cout<<"the Manchester code input is wrong,can't translate into original code."<<endl; return;//想在如果出现这个ELSE情况的时候就跳出FOR循环。。。。 } } for(i=0;i<len/2;i++) { cout<<a[i]; } cout<<endl; } /*void Decipher_DM(char code[]) //translate Differential Manchester code into original one. { int i,len,a[size]; len=strlen(code); while(len%2) { cout<<"the Differential Manchester code input is wrong.please input again:"<<endl; cin>>code; len=strlen(code); } while(len>size*2) { cout<<"the code input is beyond length limit.please input again:"<<endl; cin>>code; len=strlen(code); } if(code[0]=='0'&&code[1]=='1') a[0]=0; else if(code[0]=='1'&&code[1]=='0') a[0]=1; else cout<<"the code input is wrong.can't translate into original code."<<endl; for(i=2;i<len;i+=2) { if(code[i-1]=='0') if(code[i]=='0'&&code[i+1]=='1') a[i/2]=1; else if(code[i]=='1'&&code[i+1]=='0') a[i/2]=0; else cout<<"the code input is wrong.can't translate into original code."<<endl; else if(code[i-1]=='1') if(code[i]=='1'&&code[i+1]=='0') a[i/2]=1; else if(code[i]=='0'&&code[i+1]=='1') a[i/2]=0; else cout<<"the code input is wrong.can't translate into original code."<<endl; } for(i=0;i<len/2;i++) cout<<a[i]; cout<<endl; }*/ void main() { int choice; char code[size]; Display(); cin>>choice; cout<<"input a binary string: "; cin>>code; while(choice) { switch(choice) { // case 1: Encipher_M(code); break; // case 2: Encipher_DM(code); break; case 3: Decipher_M(code);break; // case 4: Decipher_DM(code);break; default: cout<<"false input.:"<<endl; } Display(); cin>>choice; } }