ch01-ch10

ch05/ex5_09.cpp

@@ -9,6 +9,7 @@ int main()
     unsigned aCnt = 0, eCnt = 0, iCnt = 0, oCnt = 0, uCnt = 0;
     char ch;
     while (cin >> ch) {
+        cout << ch << ' ';
         if (ch == 'a')
             ++aCnt;
         else if (ch == 'e')
@@ -20,6 +21,8 @@ int main()
         else if (ch == 'u')
             ++uCnt;
     }
+    cout << endl;
+
     cout << "Number of vowel a: \t" << aCnt << '\n' << "Number of vowel e: \t"
          << eCnt << '\n' << "Number of vowel i: \t" << iCnt << '\n'
          << "Number of vowel o: \t" << oCnt << '\n' << "Number of vowel u: \t"

ch05/ex5_11.cpp

@@ -45,8 +45,9 @@ int main()
          << "Number of vowel e(E): \t" << eCnt << '\n'
          << "Number of vowel i(I): \t" << iCnt << '\n'
          << "Number of vowel o(O): \t" << oCnt << '\n'
-         << "Number of vowel u(U): \t" << uCnt << '\n' << "Number of space: \t"
-         << spaceCnt << '\n' << "Number of tab char: \t" << tabCnt << '\n'
+         << "Number of vowel u(U): \t" << uCnt << '\n'
+         << "Number of space: \t" << spaceCnt << '\n'
+         << "Number of tab char: \t" << tabCnt << '\n'
          << "Number of new line: \t" << newLineCnt << endl;
 
     return 0;

ch06/ex6_51.cpp

@@ -24,7 +24,7 @@ void f(double, double)
 
 int main()
 {
-    f(2.56, 42); // error: 'f' is ambiguous.
+    // f(2.56, 42); // error: 'f' is ambiguous.
     f(42);
     f(42, 0);
     f(2.56, 3.14);

ch07/ex7_05.cpp

@@ -0,0 +1,16 @@
+//
+// Created by xhu on 17-11-29.
+//
+#include "ex7_05.h"
+#include <iostream>
+#include <string>
+
+int main() {
+    Person p;
+    std::string &name = p.getName();
+    std::string &address = p.getAddress();
+    name = "y";
+    address = "y";
+    std::cout << p.getName() << p.getAddress() << std::endl;
+}
+

ch07/ex7_05.h

@@ -12,12 +12,15 @@
 #include <string>
 
 class Person {
-    std::string name;
-    std::string address;
+private:
+    std::string name = "x";
+    std::string address = "x";
 
 public:
-    const std::string& getName() const { return name; }
-    const std::string& getAddress() const { return address; }
+    // const std::string& getName() const { return name; }
+    // const std::string& getAddress() const { return address; }
+    std::string& getName() { return name; }
+    std::string& getAddress() { return address; }
 };
 
 #endif

ch08/ex8_02.cpp

@@ -14,7 +14,13 @@ istream& func(istream& is)
 {
     std::string buf;
     while (is >> buf) std::cout << buf << std::endl;
+
+    std::cout << is.good() << ' ' << is.fail() << ' '
+        << is.eof() << ' ' << is.bad() << std::endl;
     is.clear();
+    std::cout << is.good() << ' ' << is.fail() << ' '
+        << is.eof() << ' ' << is.bad() << std::endl;
+
     return is;
 }
 

ch08/ex8_04.cpp

@@ -26,6 +26,8 @@ void ReadFileToVec(const string& fileName, vector<string>& vec)
     if (ifs) {
         string buf;
         while (std::getline(ifs, buf)) vec.push_back(buf);
+        std::cout << ifs.good() << ' ' << ifs.fail() << ' '
+            << ifs.eof() << ' ' << ifs.bad() << std::endl;
     }
 }
 

ch08/ex8_09.cpp

@@ -17,7 +17,13 @@ istream& func(istream& is)
 {
     std::string buf;
     while (is >> buf) std::cout << buf << std::endl;
+
+    std::cout << is.good() << ' ' << is.fail() << ' '
+        << is.eof() << ' ' << is.bad() << std::endl;
     is.clear();
+    std::cout << is.good() << ' ' << is.fail() << ' '
+        << is.eof() << ' ' << is.bad() << std::endl;
+
     return is;
 }
 

ch09/ex9_43.cpp

@@ -23,6 +23,7 @@ void Replace(string& s, const string& oldVal, const string& newVal)
                                std::distance(oldVal.begin(), oldVal.end());) {
         if (string{beg, beg + oldVal.size()} == oldVal) {
             beg = s.erase(beg, beg + oldVal.size());
+            // void string::insert(iter p, iter b, iter e)
             beg = s.insert(beg, newVal.cbegin(), newVal.cend());
             std::advance(beg, newVal.size());
         }

ch10/ex10_05.cpp

@@ -26,6 +26,7 @@ int main()
     char c2[10] = "eipi10";
     std::vector<char*> roster1{c1};
     std::list<char*> roster2{c2};
+    // compaare address not string
     std::cout << std::equal(roster1.cbegin(), roster1.cend(), roster2.cbegin());
     return 0;
 }

ch10/ex10_11.cpp

@@ -28,6 +28,7 @@ inline bool is_shorter(std::string const& lhs, std::string const& rhs)
 
 void elimdups(std::vector<std::string>& vs)
 {
+    // Both sort and std::sort are OK!
     std::sort(vs.begin(), vs.end());
     auto new_end = std::unique(vs.begin(), vs.end());
     vs.erase(new_end, vs.end());

ch10/ex10_28.cpp

@@ -47,4 +47,6 @@ int main()
     list<int> lst3;
     copy(vec.cbegin(), vec.cend(), front_inserter(lst3));
     print(lst3);
+
+    return 0;
 }

ch10/ex10_30.cpp

@@ -18,7 +18,10 @@ int main()
 {
     std::istream_iterator<int> in_iter(std::cin), eof;
     std::vector<int> vec;
-    while (in_iter != eof) vec.push_back(*in_iter++);
+    while (in_iter != eof) {
+        vec.push_back(*in_iter);
+        vec.push_back(*in_iter++);
+    }
     std::sort(vec.begin(), vec.end());
     std::copy(vec.cbegin(), vec.cend(),
               std::ostream_iterator<int>(std::cout, " "));