fix compile error

code/3/3.1.lambda.basic.cpp

@@ -10,6 +10,7 @@
 
 #include <iostream>
 #include <utility>
+#include <memory>
 
 void lambda_value_capture() {
     int value = 1;

code/3/3.3.rvalue.cpp

@@ -20,7 +20,7 @@ void reference(std::string&& str) {
 int main()
 {
     std::string  lv1 = "string,";       // lv1 is a lvalue
-    // std::string&& r1 = s1;           // illegal, rvalue can't ref to lvalue
+    // std::string&& r1 = lv1;          // illegal, rvalue can't ref to lvalue
     std::string&& rv1 = std::move(lv1); // legal, std::move can convert lvalue to rvalue
     std::cout << rv1 << std::endl;      // string,
 

code/3/3.5.move.semantics.cpp

@@ -13,19 +13,19 @@ class A {
     A():pointer(new int(1)) { 
         std::cout << "construct" << pointer << std::endl; 
     }
-    A(A& a):pointer(new int(*a.pointer)) { 
+    A(const A& a):pointer(new int(*a.pointer)) {
         std::cout << "copy" << pointer << std::endl; 
     } // meaningless object copy
-    A(A&& a):pointer(a.pointer) { 
+    A(A&& a):pointer(a.pointer) {
         a.pointer = nullptr;
         std::cout << "move" << pointer << std::endl; 
     }
-    ~A(){ 
+    ~A() {
         std::cout << "destruct" << pointer << std::endl; 
         delete pointer; 
     }
 };
-// avoid compiler optimization
+// avoid compiler RVO optimization
 A return_rvalue(bool test) {
     A a,b;
     if(test) return a; // equal to static_cast<A&&>(a);

code/4/4.1.linear.container.cpp

@@ -9,6 +9,7 @@
 #include <iostream>
 #include <array>
 #include <vector>
+#include <algorithm>
 
 void foo(int *p, int len) {
     for (int i = 0; i != len; ++i) {

code/5/5.1.shared.ptr.a.cpp

@@ -43,7 +43,7 @@ int main()
     std::cout << "pointer.use_count() = " << pointer.use_count() << std::endl;
     std::cout << "pointer2.use_count() = " << pointer2.use_count() << std::endl;
     std::cout << "pointer3.use_count() = " << pointer3.use_count() << std::endl;
-    // std::cout << *pointer << std::endl; // reference count equals 0, illegal access
+    // std::cout << *pointer3 << std::endl; // reference count equals 0, illegal access
 
 
     // Before leaving the scope, the pointer is destructed and

code/5/5.2.unique.ptr.cpp

@@ -22,7 +22,6 @@ void f(const Foo &) {
 
 int main() {
     std::unique_ptr<Foo> p1(std::make_unique<Foo>());
-
     // p1 is not empty, prints
     if (p1) p1->foo();
     {
@@ -32,15 +31,15 @@ int main() {
         f(*p2);
 
         // p2 is not empty, prints
-        if(p2) p2->foo();
+        if (p2) p2->foo();
 
         // p1 is empty, no prints
-        if(p1) p1->foo();
+        if (p1) p1->foo();
 
         p1 = std::move(p2);
 
         // p2 is empty, no prints
-        if(p2) p2->foo();
+        if (p2) p2->foo();
         std::cout << "p2 was destroied" << std::endl;
     }
     // p1 is not empty, prints

code/5/5.3.weak.ptr.cpp

@@ -24,6 +24,7 @@ class A {
 class B {
 public:
     std::shared_ptr<A> pointer;
+    // std::weak_ptr<A> pointer;
     ~B() {
         std::cout << "B was destroied" << std::endl;
     }

code/7/7.2.critical.section.a.cpp

@@ -9,6 +9,7 @@
 
 #include <iostream>
 #include <thread>
+#include <mutex>
 
 int v = 1;
 
@@ -23,7 +24,8 @@ void critical_section(int change_v) {
 }
 
 int main() {
-    std::thread t1(critical_section, 2), t2(critical_section, 3);
+    std::thread t1(critical_section, 2);
+    std::thread t2(critical_section, 3);
     t1.join();
     t2.join();
 

code/7/7.3.critical.section.b.cpp

@@ -9,6 +9,7 @@
 
 #include <iostream>
 #include <thread>
+#include <mutex>
 
 int v = 1;
 

code/7/Makefile

@@ -8,7 +8,7 @@
 all: $(patsubst %.cpp, %.out, $(wildcard *.cpp))
 
 %.out: %.cpp Makefile
-	clang++ $< -o $@ -std=c++2a -pedantic
+	clang++ $< -o $@ -std=c++2a -pedantic -pthread -latomic
 
 clean:
 	rm *.out