Updated to Chapter 13

Author: cppHusky

.vscode/Test.cpp

@@ -1,13 +1,30 @@
 #include <iostream>
-#include <string>
-#include <sstream>
-#include <iomanip>
+#include <fstream>
+#include <filesystem>
+#include <stack>
+namespace fs = std::filesystem;
 int main() {
-    std::string str {"abcdef"};
-    std::ostringstream strio {str, std::ios_base::out | std::ios_base::trunc};
-    // std::ostringstream strio {"abcdef", std::ios_base::app};
-    strio.put('g');
-    std::cout << str;
-    // std::cout << strio.str();
+    try {
+        fs::path ph {fs::current_path() / ".vscode"};
+        std::ifstream fin {ph / "in.txt"};
+        std::ofstream fout {ph / "out.txt"};
+        if (!fin.is_open()) //输入文件异常检测
+            throw std::ios_base::failure {"Cannot open in.txt"};
+        if (!fout.is_open()) //输出文件异常检测
+            throw std::ios_base::failure {"Cannot open out.txt"};
+        std::stack<char> stk; //定义一个栈，方便我们存取数据
+        int ch = {fin.get()}; //定义一个ch，逐个字符地接收get()输入数据
+        while (!fin.eof()) { //如果fin还没有读到文件结尾
+            stk.push(ch); //就说明ch是有效内容，把它填入栈中
+            ch = fin.get(); //接收下一个字符输入
+        }
+        while (stk.size()){ //只要栈中还有数据，那就说明输出还没到头
+            fout << stk.top(); //用fout输出栈顶元素
+            stk.pop(); //栈顶的元素弹出
+        }
+        std::cout << "Done" << std::endl; //提示操作完成
+    } catch (const std::ios_base::failure &msg) {
+        std::cerr << "An exception has been caught:\n" << msg.what();
+    }
     return 0;
 }

.vscode/Test.exe

@@ -11,8 +11,8 @@
                 "_UNICODE"
             ],
             "windowsSdkVersion": "10.0.22621.0",
-            "compilerPath": "cl.exe",
-            "intelliSenseMode": "windows-msvc-x64",
+            "compilerPath": "D:\\msys64\\mingw64\\bin\\gcc.exe",
+            "intelliSenseMode": "gcc-x64",
             "cppStandard": "c++17",
             "cStandard": "c11"
         }

.vscode/c_cpp_properties.json

@@ -0,0 +1 @@
+34 58 91 

.vscode/in.txt

@@ -2,31 +2,58 @@
     "configurations": [
 
         {
-            "name": "C/C++: g++.exe build and debug active file",
+            "name": "Launch with gdb",
             "type": "cppdbg",
             "request": "launch",
             "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
             "args": [],
             "stopAtEntry": false,
-            "cwd": "D:\\msys64\\ucrt64\\bin",
+            "cwd": "${workspaceFolder}",
             "environment": [],
             "externalConsole": false,
             "MIMode": "gdb",
-            "miDebuggerPath": "D:\\msys64\\ucrt64\\bin\\gdb.exe",
+            "miDebuggerPath": "D:\\msys64\\mingw64\\bin\\gdb.exe",
             "setupCommands": [
                 {
                     "description": "Enable pretty-printing for gdb",
                     "text": "-enable-pretty-printing",
                     "ignoreFailures": true
                 },
-                {
-                    "description": "Set Disassembly Flavor to Intel",
-                    "text": "-gdb-set disassembly-flavor intel",
-                    "ignoreFailures": true
-                }
             ],
             "preLaunchTask": "C/C++: g++.exe build active file"
         }
     ],
     "version": "2.0.0"
-}
+}
+// {
+//     "configurations": [
+        
+//         {
+//             "name": "C/C++: g++.exe build and debug active file",
+//             "type": "cppdbg",
+//             "request": "launch",
+//             "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
+//             "args": [],
+//             "stopAtEntry": false,
+//             "cwd": "D:\\msys64\\ucrt64\\bin",
+//             "environment": [],
+//             "externalConsole": false,
+//             "MIMode": "gdb",
+//             "miDebuggerPath": "D:\\msys64\\ucrt64\\bin\\gdb.exe",
+//             "setupCommands": [
+//                 {
+//                     "description": "Enable pretty-printing for gdb",
+//                     "text": "-enable-pretty-printing",
+//                     "ignoreFailures": true
+//                 },
+//                 {
+//                     "description": "Set Disassembly Flavor to Intel",
+//                     "text": "-gdb-set disassembly-flavor intel",
+//                     "ignoreFailures": true
+//                 }
+//             ],
+//             "preLaunchTask": "C/C++: g++.exe build active file"
+//         }
+//     ],
+//     "version": "2.0.0"
+// }

.vscode/launch.json

@@ -0,0 +1 @@
+ 19 85 43

.vscode/out.txt

@@ -60,6 +60,8 @@
         "xhash": "cpp",
         "xtree": "cpp",
         "string": "cpp",
-        "iomanip": "cpp"
+        "iomanip": "cpp",
+        "fstream": "cpp",
+        "sstream": "cpp"
     }
 }

.vscode/settings.json

@@ -3,7 +3,7 @@
         {
             "type": "cppbuild",
             "label": "C/C++: g++.exe build active file",
-            "command": "D:\\msys64\\ucrt64\\bin\\g++.exe",
+            "command": "D:\\msys64\\mingw64\\bin\\g++.exe",
             "args": [
                 "-fdiagnostics-color=always",
                 "-g",
@@ -12,7 +12,7 @@
                 "${fileDirname}\\${fileBasenameNoExtension}.exe"
             ],
             "options": {
-                "cwd": "D:\\msys64\\ucrt64\\bin"
+                "cwd": "D:\\msys64\\mingw64\\bin"
             },
             "problemMatcher": [
                 "$gcc"

.vscode/tasks.json

@@ -0,0 +1,15 @@
+#include <iostream>
+#include <string>
+#include <fstream>
+#include <iomanip>
+int main() {
+    std::ofstream fout;
+    std::cout<<"Program started.\n";
+    fout.open("out.txt", std::ios_base::out);
+    if(!fout.is_open())
+        std::cerr<<"Didn't opened the file."<<std::flush;
+    fout << 12345 << std::endl;
+    fout.close();
+    std::cout<<"Program ended."<<std::flush;
+    return 0;
+}

code_in_book/13.3/file_stream.cpp

@@ -0,0 +1,10 @@
+#include <iostream>
+#include <filesystem> //filesystem相关的内容在这里
+namespace fs = std::filesystem; //因为名字太长了，所以起个命名空间别名
+int main() {
+    fs::path ph {fs::current_path()}; //获取“当前文件夹”的路径
+    std::cout << ph << std::endl; //直接输出路径对象
+    std::cout << ph.generic_string() << std::endl; //以通用格式输出
+    std::cin.get(); //可能需要这句
+    return 0;
+}