Create TestPrintln.cpp

println & print

cpp/c++23/TestPrintln.cpp

@@ -0,0 +1,24 @@
+#include <print>
+
+int main()
+{
+    /*
+    1) Equivalent to std::println(stdout, fmt, std::forward<Args>(args)...).
+    2) Equivalent to std::print(stream, std::runtime_format(std::string(fmt.get()) + '\n'),
+           std::forward<Args>(args)...).
+    3) Equivalent to std::println(stdout).
+    4) Equivalent to std::print(stream, "\n").
+    */
+    // Each call to std::println ends with new-line
+    std::println("Please"); // overload (1)
+    std::println("enter"); // (1)
+
+    std::print("pass");
+    std::print("word");
+
+    std::println(); // (3); valid since C++26; same effect as std::print("\n"); 
+
+    std::println("Please", "enter");
+
+    std::println("Hello, {}!", "World"); // 使用C++23特性
+}