第八、九章习题(截取讲课需要的).doc

8-3 写出下列程序运行后的输出结果。1、#include #include class RMBint yuan, jiao, fen;void Norm()if(fen 9)jiao += fen/10;fen %= 10;if(jiao 9)yuan += jiao/10;jiao %= 10;void Error()coutdata not negative!endl;exit(1);public:RMB(int a=0, int b=0, int c=0)if(a0 | b0 | c0) Error();yuan = a;jiao = b;fen = c;Norm();void SetValume(int a=0, int b=0, int c=0)if(a0 | b0 | c0) Error();yuan = a;jiao = b;fen = c;Norm();void Output()coutyuan yuan，jiao jiao，fen fen= r.fen)fen -= r.fen;elseError();Norm();jiao = jiao + yuan*10;yuan = 0;if(jiao = r.jiao)jiao -= r.jiao;elseError();Norm();if(yuan = r.yuan)yuan -= r.yuan;elseError();Norm();return * this;RMB& operator * (int n)if(n0) Error();fen *= n;jiao *= n;yuan *= n;Norm();return * this;void main()RMB a, b(4,5,9), c, d(b), e;a.SetValume(2,8,5);c+a;c+b;d-a;e = d;e*3;a.Output();b.Output();c.Output();d.Output();e.Output();运行结果：2 yuan, 8 jiao, 5 fen4 yuan, 5 jiao, 9 fen7 yuan, 4 jiao, 4 fen1 yuan, 7 jiao, 4 fen5 yuan, 2 jiao, 2 fen3、（构造函数调用顺序：父类、成员变量、自身）#includeclass AXint x;public:AX(int xx=0)coutAX constructor.endl;AX()coutAX destructor.endl;void Output()coutx ;int Get() return x;class BX:public AXint y;AX z;public:BX(int xx=0, int yy=0): AX(xx), y(yy), z(xx+yy)coutBX constructor.endl;BX()coutBX destructor.end;void Output()AX:Output();coutGet() ;couty z.Get()endl;void main()BX a(5), b(10,20);a.Output();b.Output();运行结果：AX constructor.AX constructor.BX constructor.AX constructor.AX constructor.BX constructor.5 5 0 510 10 20 30BX destructor.AX destructor.AX destructor.AX destructor.AX destructor.4、#includeclass AYprotected:int a,b;public:AY(int aa=0, int bb=0)a=aa;b=bb;virtual void Computer()couta+b=a+bendl;class BY:public AYpublic:BY(int aa=0, int bb=0):AY(aa, bb) void Compute()couta-b=a-bendl;class CY:public BYpublic:CY(int aa=0, int bb=0):BY(aa, bb) void Compute()couta*b=a*bendl;class DY:public AYpublic:DY(int da=0, int db=0):AY(da, db)void Compute()if(b!=0)couta/b=a/bendl;elsecoutdivisor is zero!endl;void main()int n=10, m=5;AY ay(n,m);BY by(n,m);CY cy(n,m);DY dy(n,m);AY * a4=&ay, &by, &cy, &dy;for(int i=0; iCompute();AY &ax = cy;ax.Compute();AY aa=cy;aa.Compute();运行结果：10+5=1510-5=510*5=5010/5=210*5=5010+5=155、#include#include#includeconst int MaxSize=20;struct AAchar a10;int b;int operator(AA& x)return (bx.b)?1:0;int operator(AA& x)return (bx.b)?1:0;void operator+=(AA& x)b += x.b;float operator/(int n)return float(b)/n;ostream& operator(ostream& ostr, AA& x)ostrx.a x.b;return ostr;templateclass ListDataType listMaxSize;int n;public:List()n=0;List(DataType a, int);void OutMax();void OutMin();void OutMean();templateList:List(DataType a, int nn)if(nnMaxSize)coutthe valume of n not correct!endl;exit(1);n=nn;for(int i=0; in; i+) Listi=ai;templatevoid List:OutMax()int k=0;for(int i=1; ilistk) k=i;coutMaximum:listkendl;templatevoid List:OutMin()int k=0;for(int i=1; in; i+)if(listilistk) k=i;coutMinimum:listkendl;templatevoid List:OutMean()DataType s=list0;for(int i=1; in; i+) s+=listi;coutMean:s/nendl;void main()int a16 = 4,7,6,2,5,9;AA a24 = xxk,46, wr,44, nch,39, shyf,48;List b1(a1, 6);b1.OutMax();b1.OutMin();b1.OutMean();List b2(a2,4);b2.OutMax();b2.OutMin();b2.OutMean();运行结果：Maximum: 9Minimum: 2Mean: 5Maximum: shyf 48Minimum: nch 39Mean: 44.259-3 按照下面每个题目的要求编写出相应的函数1、利用一个文本文件保存100以内的所有素数。void Prime (char * fname)ofstream fs(fname);fs2 ;for(int i = 3; i100; i+=2)int k = int(sqrt(i);for(int j=2; j k)/表明i是一个素数fsi ;fs.close();2、利用一个二进制文件保存20个100以内的随机整数，要求保存的所有值各不相同。void Random(char * fname)int a20;int x;ofstream fs(fname, ios:binary);for(int i=0; i20; i+)while(i)x = rand() % 10