运算符重载程序例题解答.docx

/*1.定义一个复数类，通过重载运算符：+、-、*、/ 等，实现两个复数之间的各种运算。编写一个完整的程序。*/#includeclass Complexfloat Real,Image;public:Complex(float x=0,float y=0)Real=x;Image=y;friend Complex operator + (Complex &,Complex &);friend Complex operator - (Complex &,Complex &);friend Complex operator * (Complex &,Complex &);friend Complex operator / (Complex &,Complex &);void show()coutReal=RealtImage=Imageendl;Complex operator + (Complex &a,Complex &b)Complex t;t.Real=a.Real+b.Real;t.Image=a.Image+b.Image;return t;Complex operator - (Complex &a,Complex &b)Complex t;t.Real=a.Real-b.Real;t.Image=a.Image-b.Image;return t;Complex operator * (Complex &a,Complex &b) Complex t;t.Real=a.Real*b.Real-a.Image*b.Image;t.Image=a.Real*b.Image+a.Image*a.Real;return t;Complex operator / (Complex &a,Complex &b) Complex t;t.Real=(a.Real*b.Real+a.Image*b.Image)/(b.Real*b.Real+b.Image*b.Image);t.Image=(a.Image*a.Real-a.Real*b.Image)/(b.Real*b.Real+b.Image*b.Image);return t;void main()Complex c1(10,20),c2,c3(50,40);c2=c1+c3;c2.show();c2=c1-c3;c2.show();c2=c1*c3;c2.show();c2=c1/c3;c2.show();/*2.定义描述一个三维点，利用友元函数重载+和-运算符，并区分这两种运算符的前置和后置运算。*/#includeclass pointint x;int y;int z;public:point(int X=0, int Y=0,int Z=0)x=X;y=Y;z=Z;point operator +(point &a)point t;t.x=x+a.x;t.y=y+a.y;t.z=z+a.z;return t;friend point operator +(point &a);friend point operator +(point &,int);friend point operator -(point &);friend point operator -(point &,int);void show()coutx=xty=ytz=zendl;point operator +(point &a)point t;t.x=+a.x;t.y=+a.y;t.z=+a.z;return t;point operator +(point &a,int)point t;t.x=a.x+;t.y=a.y+;t.z=a.z+;return t;point operator -(point &a) point t;t.x=-a.x;t.y=-a.y;t.z=-a.z;return t;point operator -(point &a,int)point t;t.x=a.x-;t.y=a.y-;t.z=a.z-;return t;void main()point p1(10,20),p2(30,40),p3;p3=p3+p1;p3.show();p3=+p1;p3.show();p1.show();p3=-p1;p3.show();p1.show();p3=p2+;p3.show();p2.show();p3=p2-;p3.show();p2.show();/*3.完善字符窜类，增加以下运算符的重载：+、- 等，实现两个字符窜间的运算。*/#include#includeclass strint length;char *p;public:str()length=0;p=0;str(char *s)if(s) length=strlen(s)+1;p=new char length;strcpy(p,s);else length=0;p=0; str(str &s1)length=s1.length +1;p=new char length;strcpy(p,s1.p);str()if(p) delete p;friend str operator +(str &,str &);friend str operator -(str &,str &);void operator =(str &);void show()coutlength=lengthtpendl;str operator +(str &a,str &b)str s;s.length=a.length+b.length;s.p=new chars.length+1;s.p=strcpy(s.p,a.p);strcat(s.p,b.p);return s;str operator -(str &a,str &b)str s;char *p1=a.p,*p2;int i=0,len=strlen(b.p);if(p2=strstr(a.p,b.p)s.length=a.length-len;s.p=new chars.length+1;while(p1p2)s.pi+=*p1+;p1+=len;while(s.pi+=*p1+);else s.length=a.length;s.p=new char s.length+1;strcpy(s.p,a.p);return s;void str:operator =(str &a)length =a.length +1; p=new char length; strcpy(p,a.p);void main()char *a=I am a ,*b=student!;str A(a),B(b),C;C=A+B;C.show();C=C-B;C.show();/*附加题定义一个字符窜类，用来存放不定长的字符窜，重载运算符= =、,用于两个字符窜的等于、小于和大于的比较运算。*/#include#includeclass strchar *p;public:str()p=0;str(char *s)p=s;friend bool operator (str &,str &);friend bool operator (str &,str &);friend bool operator =(str &,str &);void show()cout(str &a,str &b)if(strcmp(a.p,b.p)0) return 1;else return 0;b