测试

base/CMakeLists.txt

@@ -50,4 +50,7 @@ add_executable(newplace namespacetest/newplace.cpp)
 add_executable(usestock0 class/usestock0.cpp)
 add_executable(stock20 class/stock20.cpp)
 add_executable(useStock20 class/useStock20.cpp)
-add_executable(namessp namespacetest/namessp.cpp)
+add_executable(namessp namespacetest/namessp.cpp)
+add_executable(string new/string.cpp)
+add_executable(placenew new/placenew.cpp)
+add_executable(usett extend/usett.cpp)

base/extend/dma.cpp

@@ -90,5 +90,6 @@ std::ostream &operator<<(std::ostream &os, const hasDMA &hs) {
     //第二种 第二种使用dynamic_cast运算符强制类型转换
     os << dynamic_cast<const baseDMA &>hs;
     os << "Style: " << hs.style << std::endl;
+
     return os;
 }