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outfilseekp(321,ios_base::cu; outfilseekp(321,ios_base::be; outfilseekp(-321,ios_ase::be; outfilseekp(-321,ios_base::cu;
OPEN(UNIT=3,FILE=‘QW’) OPEN(3,FILE=QW) OPEN(FILE=‘QW’,3,STATUS=OLD) OPEN(3,FILE=QW,STATUS=UNKNOWN)
outfilseekp(321,ios_base::cu; outfilseekp(321,ios_base::bg; outfilseekp(-321,ios_base::be; outfilseekp(-321,ios_base::cu;
cout < < 23.78965421; cout < < fixed < < 23.78965421: cout < < 23.78965421 -0.001: cout < < fixed < < 23.78965421 -0.001;
ch=Systeiread(); ch=(chaSysteiread(); ch=(chaSysteireadln(); ch=(inSysteiread();
outfilseekp(321,ios_base::cu; outfilseekp(321,ios_base::be; outfilseekp(-321,ios_base::be; outfilseekp(-321,ios_base::cu;
ch= Systeiread(); ch=(chaSystcm iread(); ch=(chaSysteireadln(); ch=(inSystem iread();
cout<<23.78965421; cout<<fixed<<23.78965421; cout<<23.78965421-0.001; cout<<fixed<<23.78965421-0.001;
ch=Systeiread(); ch=(chaSysteiread(); ch=(chaSysteireadln(); ch=(inSysteiread();
outfilseekp (321, ios_ base:: cu; outfilseekp (321,ios_ base:: be; outfilseekp (-321,ios_ base:: be; outfilseekp (-321,ios_ base:: cu;
一个子类的两个父类中都有某个同名成员,在子类中对该成员访问可能出现二义性 解决二义性可以用对成员名的限定法 父类和子类中同时出现同名函数,也可能存在二义性 一个子类是从两个父类派生出来的,而这两个父类又有一个共同的父类,对该父类成员进行访问时,可能出现二义性
cout < < 23.78965421; cout < < fixed < < 23.78965421; cout < < 23.78965421-0.001; cout < < fixed < < 23.78965421-0.001;