自定义异常

CMakeLists.txt

@@ -3,4 +3,4 @@ project(cpp_15_exception)
 
 set(CMAKE_CXX_STANDARD 11)
 
-add_executable(cpp_15_exception main.cpp)
+add_executable(cpp_15_exception main.cpp MyException.cpp MyException.h)

MyException.cpp

+//
+// Created by 11010 on 2023/4/9.
+//
+
+#include "MyException.h"
+
+const char *MyException::what() const throw() {
+    return "CPP error,Çë¼ì²â³ÌÐò£¡";
+}

MyException.h

+//
+// Created by 11010 on 2023/4/9.
+//
+
+#ifndef CPP_15_EXCEPTION_MYEXCEPTION_H
+#define CPP_15_EXCEPTION_MYEXCEPTION_H
+#include "exception"
+
+class MyException :public std::exception{
+public:
+const char * what() const throw() override;  //重写what函数：用于返回当前程序的具体异常描述
+};
+
+
+#endif //CPP_15_EXCEPTION_MYEXCEPTION_H

main.cpp

 #include <iostream>
+#include "MyException.h"
+#include "exception"
 
 int result(int a, int b);
 
@@ -28,7 +30,22 @@ int main() {
     }
 
 
-    //通过继承和重载 exception 类来定义新的异常
+    //通过继承和重载 exception 类来定义新的异常： 定义新的类MyException继承exception自定义新的异常
+    try {
+        throw MyException();  //抛出自定义异常
+    }
+    //捕获异常
+    catch (MyException&  e){
+     std::cout<<e.what()<<std::endl;
+    }
+
+
+    //使用c++标准异常
+    try {
+        throw std::bad_exception();
+    }catch (std::bad_exception& e){
+       std::cout<< e.what()<<std::endl;
+    }
 
     return 0;
 }