添加字符串操作

base/CMakeLists.txt

@@ -82,6 +82,7 @@ add_executable(constcast exception/constcast.cpp)
 add_executable(str1 string/str1.cpp)
 add_executable(strfile string/strfile.cpp)
 add_executable(hangman string/hangman.cpp)
+add_executable(str2 string/str2.cpp)
 add_executable(vect1 stl/vect1.cpp)
 add_executable(vect2 stl/vect2.cpp)
 add_executable(vect3 stl/vect3.cpp)

base/string/smrtptrs.cpp

@@ -0,0 +1,29 @@
+//
+// Created by nicemoe on 2021/9/18.
+//
+
+#include  <iostream>
+#include <string>
+#include <memory>
+using namespace std;
+
+class Report{
+private:
+    string str;
+public:
+    Report(const string s) :str(s){
+        sout <<"Object created!"<<endl;
+    }
+    ~Report(){
+        cout<<"Object deleted!"<<endl;
+    }
+    void comment(){
+        cout<<str<<endl;
+    }
+};
+int main() {
+    {
+        auto_ptr<Report> ps (new Report("using "))
+    }
+    return 0;
+}

base/string/str2.cpp

@@ -10,9 +10,17 @@ int main() {
 
     string empty;
     string small = "bit";
-    string larget = "Elephants are a girl's best friend";
+    string larger = "Elephants are a girl's best friend";
     cout <<"Sizes:\n";
-    cout <<""
+    cout <<"\tempty: "<<empty.size()<<endl;
+    cout <<"\tsmall: "<<small.size()<<endl;
+    cout <<"\tlarger: "<<larger.size()<<endl;
+    cout <<"\tCapacities: "<<endl;
+    cout <<"\tempty: "<<empty.capacity()<<endl;
+    cout <<"\tsmall: "<<small.capacity()<<endl;
+    cout <<"\tlarger: "<<larger.capacity()<<endl;
+    empty.resize(50);
+    cout<<"Capacity after empty.reserve(50): "<<empty.capacity()<<endl;
     return 0;
 }