"C++primer" v5 the 8th Chapter IO Library reading notes Exercise answer

8.1, 8.2

This chapter is not a good thing.

IStream &read (IStream &is) {    int  A;    Auto Old_state=is. Rdstate ();      is . Clear ();     is >>A;      is . SetState (old_state);     return  is ;} int Main () {    read (CIN);     return 0 ;}

8.3

When you read the EOF or the wrong type

8.4

#include <fstream>using namespacestd;intMain () {Ifstreaminch("Ifile.txt"); Vector<int>VEC; intA;  while(inch>>a) vec.push_back (a);  for(auto I:vec) cout<<i<<Endl; return 0;}

8.5

#include <fstream>using namespacestd;intMain () {Ifstreaminch("Ifile.txt"); Vector<string>VEC; strings;  while(inch>>s) vec.push_back (s);  for(auto I:vec) cout<<i<<Endl; return 0;}

8.6, 8.7, 8.8

Temporary:

8.9

#include <sstream>using namespaceStd;istream&read (IStream & is){    strings; Auto Old_state= is. Rdstate ();  is. Clear ();  while( is>>s) cout<<s<<Endl;  is. SetState (old_state); return  is;}intMain () {strings;    Getline (cin,s); Istringstream is(s); Read ( is); return 0;}

8.10

#include <fstream>#include<sstream>using namespacestd;intMain () {FStreaminch("Ifile.txt"); strings; Vector<string>VEC;  while(Getline (inch, s))    {Vec.push_back (s); }     for(Auto &C:vec)        {Istringstream isout (c); stringWord;  while(isout>>word) cout<<word<<Endl; }    return 0;}

8.11

Using the clear and STR two member functions

#include <fstream>#include<sstream>using namespacestd;intMain () {FStreaminch("Ifile.txt"); strings; Vector<string>VEC;  while(Getline (inch, s))    {Vec.push_back (s);    } Istringstream isout;  for(intI=0; I<vec.size (); ++i) {isout.clear ();        Isout.str (Vec[i]); stringWord;  while(isout>>word) cout<<word<<Endl; }    return 0;}

8.12

?

8.13

Temporary:

"C++primer" v5 the 8th Chapter IO Library reading notes Exercise answer