Tricky machine code

#include<cstdio> #include<fstream> #include<iomanip> #include<iostream> using namespace std; int main(){ ifstream ifs("L7_F0_P4a.dat",ios::binary); if(!ifs){ cout<<"Error opening file\n"; return 1; } int len; unsigned char txt[16]; while(ifs){ ifs.read(reinterpret_cast<char*>(txt),16);//将txt强制转化成指向字符数组的指针 cout<<"txt:"<<txt<<endl; //所以这里是默认变成16进制了！quite funny len=ifs.gcount(); cout<<"len:"<<dec<<len<<endl; if(len==0) break; for(int i=0;i<len;i++){ // cout <<setfill('0')<<setw<<hex<<static_cast<int>(txt[i]-48)<<" "; cout<<setfill('0')<<setw(2)<<hex<<static_cast<int>(txt[i]-'0')<<" "; } //$$$ cout<<"| "; for(int i=0;i<len;i++){ if(txt[i]=='\n'||txt[i]=='\r'||txt[i]=='\b'||txt[i]=='\a'){ cout<<'.'; } else{ cout<<txt[i]; } } cout<<" |"<<endl; len=0; txt[0]='\0'; } ifs.close(); return 0; }