实验四参考答案

1一、实验目的掌握继承与派生的概念。掌握派生类的声明与构成。掌握派生类的继承方式和访问控制权限。掌握派生类构造函数和析构函数的使用方法。掌握基类与派生类的类型转换。二、实验内容和步骤1程序填空填入相应的内容，使得程序可以正常运行。1INCLUDEUSINGNAMESPACESTDCLASSAPROTECTEDCHARNAME80PUBLICACONSTCHARNSTRCPYNAME,NCLASSBPUBLICAPUBLICB_VOIDPRINTNAMECOUTUSINGNAMESPACESTDCLASSBASEPUBLICVOIDFUNCOUTINCLUDEUSINGNAMESPACESTD3CLASSPERSONSTRINGNAMESTRINGSEXSTRINGIDSTRINGPHONEPUBLICVOIDOUTPUTVOIDINPUTPERSONSTRINGNAME“,STRINGSEX“,STRINGID“,STRINGPHONE“VOIDPERSONOUTPUTCOUTNAMECOUTSEXCOUTIDCOUTPHONEPERSONPERSONSTRINGNAME,STRINGSEX,STRINGID,STRINGPHONETHISNAMENAMETHISSEXSEXTHISIDIDTHISPHONEPHONECLASSSTUDENTPUBLICPERSONSTRINGSTU_NOSTRINGMAJORPUBLICVOIDINPUT4VOIDOUTPUTSTUDENTSTRINGNAME“,STRINGSEX“,STRINGID“,STRINGPHONE“,STRINGSTU_NO“,STRINGMAJOR“VOIDSTUDENTINPUTPERSONINPUTCOUTSTU_NOCOUTMAJORVOIDSTUDENTOUTPUTPERSONOUTPUTCOUTSTU_NOSTU_NOTHISMAJORMAJORCLASSTEACHERPUBLICPERSONSTRINGTEA_NOSTRINGPROFSTRINGDEPTPUBLICVOIDINPUTVOIDOUTPUTTEACHERSTRINGNAME“,STRINGSEX“,STRINGID“,STRINGPHONE“,STRINGTEA_NO“,STRINGPROF“,STRINGDEPT“VOIDTEACHERINPUTPERSONINPUTCOUTTEA_NOCOUTPROFCOUTDEPT5VOIDTEACHEROUTPUTPERSONOUTPUTCOUTTEA_NOTEA_NOTHISPROFPROFTHISDEPTDEPTINTMAINSTUDENTS1,S2“张三“,“男“,“310100111111110000“,,“20100000“,“电自“TEACHERTS2OUTPUTS1INPUTS1OUTPUTTINPUTTOUTPUTRETURN0运行结果（直接截取结果图）2声明一个哺乳动物MAMMAL类，含有WEIGHT（出生重量，克）数据成员和OUT_INFO成员函数（输出出生重量信息），再由此派生出狗DOG类，新增COLOR（颜色）数据成员，并重定义OUT_INFO成员函数（该函数中调用基类的OUT_INFO成员函数以完成对基类派生得到的那些属性的输出，然后再输出新增的数据成员信息），要求基类和派生类分别带有带参构造函数、不带参构造函数、析构函数。在主函数中分别定义使用了默认构造函数的DOG类对象和带参构造函数的DOG类对象，观察基类与派生类的构造函数与析构函数的调用顺序。程序源代码（注意添加注释）INCLUDEINCLUDEUSINGNAMESPACESTDCLASSMAMMAL6PROTECTEDINTWEIGHTPUBLICMAMMALWEIGHT1COUTUSINGNAMESPACESTDCLASSSHAPEDOUBLEAREAPUBLICSHAPEDOUBLEA0AREAA8DOUBLEGETAREARETURNAREACLASSRECTANGLEPUBLICSHAPEDOUBLEA,BPUBLICRECTANGLEDOUBLEAA0,DOUBLEBB0SHAPEAABB,AAA,BBBVOIDCALC_PERIMETERCOUT“周长为“2ABENDLCLASSCIRCLEPUBLICSHAPEDOUBLERPUBLICCIRCLEDOUBLEBJ0SHAPE314BJBJ,RBJVOIDCALC_PERIMETERCOUT“周长为“628RENDLCLASSSQUAREPUBLICRECTANGLEDOUBLEDPUBLICSQUAREDOUBLEBIAN0RECTANGLEBIAN,BIAN,DBIANINTMAIN9SQUARES3COUT“边长为3的正方形“COUT“面积为“SGETAREAENDLSCALC_PERIMETERRECTANGLER2,5COUT“边长