first commit

Author: yyin-dev

.gitignore

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+.vscode
+.exe
+
+# build directories
+.DS_STORE
+.idea/
+config.log
+target/
+_build/

README.md

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+# read_cpp_primer

TT_Primer_note.pdf

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+#include<iostream>
+using namespace std;
+
+int main() {
+    if (__cplusplus == 201703L) {
+      cout << "C++17\n";
+    } else if (__cplusplus == 201402L) {
+      cout << "C++14\n";
+    } else if (__cplusplus == 201103L) {
+      cout << "C++11\n";
+    } else if (__cplusplus == 199711L) {
+      cout << "C++98\n";
+    } else {
+      cout << "pre-standard C++\n";
+    }
+    return 0;
+}

ch1/0_check_version.cpp

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+#include<iostream>
+using namespace std;
+
+int main() {
+    cout << "This is an normal output\n";
+    cerr << "This is an error\n";
+    clog << "This is a log\n";
+    return 0;
+}

ch1/0_check_version.exe

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+#include<iostream>
+using namespace std;
+
+//
+//   If you have nested comment pairs, compiler gives the following error message: 
+// 
+//   2_comments.cpp:7:3: error: expected unqualified-id before '/' token
+//   */
+//    ^
+// 
+
+
+int main() {
+    cout << "/*";
+    cout << "*/";
+    // cout << /* "*/" */ ;
+    cout << /* "*/" /* "/*" */;
+    return 0;
+}

ch1/1_io.cpp

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+#include <iostream>
+using namespace std;
+
+int main() {
+    cout << "The way to generate end-of-file through keyboard: press Ctrl+Z and then press Enter.\n";
+
+    int sum = 0;
+    int val = 0;
+    cout << "Enter as many integers as you like to get the sum: \n";
+    while ( cin >> val){
+        sum += val;
+    }
+
+    cout << "Sum: " << sum;
+}