C++机试答案.doc

10书名：C++语句。。。。。
(1)Book(const char *theTitle, int pages) : num_ pages(pages)
(2)void openAtPage(int page_no) { //把书翻到指定页
(3)cur_page = 0;
办公室房间号308
(1)return length * width;
(2)Room(the room_no, the_length, the_width)
(3)depart, the_depart
(4)an office(308,5.6,4.8,"会计科"
Hello！
length = otherString.length;
setString(otherString.sPtr);
return *this;
11constructor called
(1)MyClass(int i = 10)
(2)MyClass(const MyClass & p)
(3)~MyClass()
12345 23456
34567
(1)getElement(i, j)
(2)MatrixBase(rows, cols)
(3)new double[rows*cols]
(4)r == c
两个数据表
for( int i=0; i < len; ++i)
dd[i] = d[i] + list.d[i];
12There is awhite dog named hoho
(1)this->color = color;
(2)const char getName() const { return *name; }
(3)Dog dog1("Hoho", WHITE), dog2("Haha", BLACK), dog3("Hihi", OTHER);

(1)const Point& p
(2)p1(p1), p2(p2)
(3)Point p1, Point p2, Point p3
(4)(length1() + length2() + length3())/2

for(int i = 0; i < len; ++i)
for(int j = i; j < len; ++j)
if( d[i] > d[j])
{
int temp = d[i];
d[i] = d[j];
d[j] = temp;
}
13(1)Line(double x1, double y1, double x2, double y2) {
(2)cout<< "),length = "<< length(*this)<< "。"<< endl;
(3)return sqrt((l.getX1() - l.getX2()) * (l.getX1() - l.getX2()) + (l.getY1() - l.getY2()) * (l.getY1() - l.getY2()));
【参考答案】
(1)getElement(length()-1)<<
(2)delete []val
(3)s += val[i]
(4)return 0.0;
for( int i = 0; i < len; ++i) if (data < d[i])
{ len++; double *dd = new double[len];
for (int k = len; k >i; k--) dd[k] = d[k-1];
dd[i] = data; for (int j = 0; j < i; j++)
[j] = d[j]; delete []d; d = new double[len];
for (int index = 0; index < len; ++index)
d[index] = dd[index]; delete []dd; break; }
14 (1)char *Name;
(2)~StudentInfo() {}
(3)StudentInfo::StudentInfo(char *name, int age, int ID, int courseNum, float record)
【参考答案】
(1)MaxSpeed(maxspeed), Weight(weight) { };
(2)virtual
(3)virtual
(4)public bicycle, public motorcar
【参考答案】
n = r.n;
delete []p;
p = new int[n];
for (int i = 0; i < n; i++)
p[i] = r.p[i];
return *this;
15 (1)MyClass(int val) : N(1)
(2)~MyClass() { delete [] p; }
(3)void print(MyClass & obj)
【参考答案】
(1)virtual void print() const = 0
(2)Component* child
(3)cout<< "Leaf Node"<< endl;
【参考答案】
int temp = 0;
for (int i = 0; i < M; i++)
for (int j = 0; j < N; j++)
if (temp < array[i][j])
temp = array[i][j];
return temp;
16 (1)this->num = num; (2)if(!closed)
(3)void lock(){
【参考答案】
(1)is_male(is_male), birth_date(birth_date)
(2)return strcmp(name, p.getName());
(3)<<birth_date.getMonth()<< "月"
【参考答案】
for (int i = 0; i < counter; i++)
if (element == elem[i])
{ for (int j = i; j < counter-1; j++)
elem[j] = elem[j+1];
counter--; return; }
17 (1)TVSet(int size) : size(size) {
(2)void turnOnOff()
(3)cout<<"规格:"<< getSize()<<"英寸"
【参考答案】
(1)x1(root), x2(root), num_of_roots(1)
(2)cout<< "无实根" ; break;
(3)a(a), b(b), c(c)
(4)return Quadratic(a - x.a, b - x.b, c - x.c);
【参考答案】
for (int i = 0; i < counter; i++)
for (int j = counter -1; j > i; j--)
if (elem[i] > elem[j])
{ int temp = elem[i];
elem[i] = elem[j];
elem[j] = temp; }
18【参考答案】
(1)int Foo::y_= 42; (2)Foo f('a');
(3)cout<< "X = "<< f.getX()<< endl;
【参考答案】
(1)point.getX() + width, point.getY() + height
(2)radius * radius
(3)center.getX() - radius, center.getY() - radius
(4)2 * radius;
【参考答案】
int length = strlen(str);
for (int i = 0, j = length -1; i < j; i++, j--)
{ char temp = str[i];
str[i] = str[j];
str[j] = temp;
}
【参考答案】
int length = strlen(str);
for (int i = 0, j = length -1; i < j; i++, j--)
{ char temp = str[i];
str[i] = str[j]; str[j] = temp; }
19【参考答案】
(1)this->type = type;
(2)delete [] name;
(3)strcpy(this->name,s.name);
【参考答案】
(1)virtual int area(void) = 0;
(2)area()
(3)length * height
(4)CPolygon
【参考答案】
size = other.size;
v = new int[size];
for (int i = 0; i < size; i++)
setArray(i,other.v[i]);
20 (1):x(x), y(y) {}或this->x=x,this->y=y;
(2)void show() const { cout<< '('<< x<< ','<< y<< ')'; }
(3): p1(pt1), p2(pt2) {}或{p1=pt1;p2=p2}
【参考答案】
(1)top(-1) {}
(2)data[top--]
(3)top(NULL)
(4)p->next = top;

【参考答案】
for (int i = 0; i <=set.GetEnd(); i++)
if (IsMemberOf(set.GetElement(i)))
a[size++] = set.GetElement(i);
21 (1)const char * theBrand()const{ return brand;} //返回电扇品牌
(2)void turnOff(){ intensity = 0; } //关电扇
(3)if (inten >=1 && inten <= 3) intensity = inten;
【参考答案】
(1)strcpy(brand, the_brand);
(2)number = new char[strlen(the_number) + 1];
(3)theBrand()
(4)const { return "卡车"; } //返回汽车类别
【参考答案】
int min = x.a < x.b ? x.a : x.b;
for (int i = 2; i <= min; i++)
if (x.a%i == 0 && x.b%i == 0)
return i;
return -1;

22 (1):base(the_base), bonus(the_bonus), tax(the_tax)
(2)~Salary(){ delete []staff_id; }
(3)cout<<"实发工资:"<<pay.getNetPay()<<endl;
【参考答案】
(1)strcpy(this->office, office);
(2)return office
(3)dept(my_dept) {
(4)dept.changeOfficeTo("311");
【参考答案】
if (income <= 2000)
return tax payable;
if (taxable > lower limits[i]){
tax payable += (taxable - lower limits[i])*rates[i];
taxable = lower limits[i]; }
23 (1)ABC() : a(0), b(0), c(0) {}
(2)int s1 = x.Sum() + y.Sum();
(3)int s2 = s1 + w->Sum();
【参考答案】
(1)public Base
(2)Base::sum()
(3)Derived::
(4)Base(m1, m2)
【参考答案】
for (int i = 0, j = m-1; i < j; i++, j--)
{
Type temp = a[i];
a[i] = a[j];
a[j] = temp; }
24【参考答案】
(1)strcpy(student_id,the_id);
(2)const char *getID()const{ return student_id; } //返回学号
(3)int Score::getFinal() const {
【参考答案】
(1)strcpy(classroom, room);
(2)return classroom;
(3)my_class(the_class)
(4)cla.changeRoomTo("311");
【参考答案】
for (int i = 1; i < num of terms; i++)
{
int j = i-1;
double x value = x;
while(j > 0)
{ x value *= x; j--; }
value += coef[i]*x value; }
25【参考答案】
(1)void Clock::print() const
(2)set(++total_sec);
(3)return *this;
【参考答案】
(1)char[strlen(str) + 1];
(2)Mammal(str)
(3)return output[MOUSE];
(4)Elephant
【参考答案】
sListItem* temp = new sListItem;
temp->data = c;
temp->next = h;
h = temp;
26【参考答案】
(1)public:
(2)SetDate(d,m,y);
(3)cout<< m_nYear<< "-"<< m_nMonth<< "-"<< m_nDay;
【参考答案】
(1)name_(name), dept_(dept)
(2)return dept_;
(3)Employee(name, dept), level_(level)
(4)Employee::print();
【参考答案】
(1)cout<< firstname<< " "<< surname
(2)head[i] = start[i]
(3)return new Name2(s); else return new Name1(s)
27【参考答案】
(1)public:
(2)for(int i=0; i<n; i++) a[i]=aa[i];
(3)for(int i=0; i<6; i++) sum+=x.Geta(i);
【参考答案】
(1)!InSet(*s)
(2)setdata[num++] = *s
(3)c == setdata[i]
(4)return true
【参考答案】
MiniComplex sum;
sum.imagPart= this->imagPart + otherComplex.imagPart;
sum.realPart = this->realPart + otherComplex.realPart

28 (1)delete [] array; (2)cout<< array[i]<< ' ';
(3)MyClass obj(10);
【参考答案】
(1) a[num] = e; (2) Array(s)
(3) a[j] = a[j - 1]; (4) a[i] = e;
【参考答案】
(1) MyVector::MyVector
(2) i.x - j.x, i.y - j.y (3) v1 + v2
29 (1)MyClass(int i = 0):value(i)
(2)int MyClass::count = 0;
(3)obj2.Print();
【参考答案】
(1)++q; ++s;
(2)(*p = *s) != 0【参考答案】
(1)rad(r) (2)2*c.radius()
(3)MyCircle a
30【参考答案】
(1)strcpy(this->name,name);
(2)PetType getType() const {return type; }
(3)return "an unkown animal";
【参考答案】
(1)item < setdata[i]
(2)setdata[size + i - j] = setdata[size+i-j-1]
(3)setdata[size] = item
【参考答案】
(1)point1(p1), point2(p2)
(2)length()const
(3)point2.getY() - point1.getY()
31 (1)MyClass(const MyClass & copy) { p = new char; *p = *(copy.p); }
(2)~MyClass() {delete p; }
(3)return *this;
【参考答案】
(1)new int [size] (2)_p[index] = value
(3)return _p[index]
(4)index >_size
【参考答案】
void doc::count()
{ for (int i = 0; i < length; ++i)
{ if(str[i])>='a'&&str[i]<='z')
counter[str[i]-'a']+'+;
if(str[i])>'A'&&str[i]<='Z')
couner[str[i]-'A']+'+; }
for (int index = 0; index < 26; ++index)
cout<< (char)(index + 65)<< " or "<< (char)(index + 97)
<< " 出现的次数是:"<< counter[index]<< endl; }
32 (1)MyClass(int x) : flag(x) {}
(2)void MyClass::Judge()
(3)break;
【参考答案】
(1)int num = 0 (2)*str;(3)str++;
【参考答案】
(1) strcpy(idcardno,id card no)
(2) Person(id card no,p name,birth date,is male)
(3) Staff Zhangsan("123456789012345","张三",Date(1979,5,10),false,"人事部",1234.56)
33 (1)protected:
(2)msg = new char[strlen(str) + 1];
(3)~Base() { delete [] msg; }
【参考答案】
(1)q->link = head
(2)p = new node
(3)Insert(p)
【参考答案】
for (int i = 0; i < size-1; i++)
{
int temp = v[i];
v[i] = v[i+1];
v[i+1] = temp; }
34 (1)~MyClass() (2)int value;
(3)void MyClass::Print() const
【参考答案】
(1)virtual const char* toString()const = 0
(2)HexNumber(int k) : Number(k) {}
(3)cout<< number.toString()
(4) show(HexNumber(11))
【参考答案】
MiniString( const char *s = " ")
{
length = strlen(s);
sPtr = new char[length+1];
strcpy(sPtr, s); }
MiniString() { delete [] sPtr; }

35 (1)Circle(int r) : radius(r) {}
(2)void Circle::Display()
(3)c.Display();
【参考答案】
(1)x = y (2)Sort(a0, n0)
(3)swap(a[j], a[j-1]) (4)break
【参考答案】
MiniString& operator+=(const MiniString& s)
{ char *pt = new char [length+1];
strcpy(pt, sPtr); int blength = length;
length += s.length; delete []sPtr;
sPtr = new char[length+1];
strcpy(sPtr,pt); delete []pt;
for (int i = 0; i < length; ++i)
sPtr[blength+i] = s.sPtr[i];
return *this; }
36 (1)void Judge(MyClass &obj)
(2)(ptr+i)->Set (i + 1);
(3)delete [] ptr;
【参考答案】
(1)strlen(s) + 1 (2)delete []m_str
(3)m_str[n-i-1] (4)m_str[n-i-1] = tmp
【参考答案】
MiniString& operator+ (const MiniString& s)
{ char *pt = new char [length+1];
strcpy(pt, sPtr);
int blength = length;
length += s.length;
delete []sPtr;
sPtr = new char[length+1];
strcpy(sPtr,pt);
delete []pt;
for (int i = 0; i < length; ++i)
sPtr[blength+i] = s.sPtr[i];
return *this; }
37 (1)Rectangle(double x1, double y1, double x2, double y2){
(2)void show(Rectangle r){
(3)cout<< r.getX1()<< " , "<< r.getY1()<< "),down right=("<< r.getX2()<< " , "<< r.getY2();
【参考答案】
(1)const Point& p (2)distanceTo(p2)
(3)Point(down_right.x, upper_left.y)
(4)width() * height()【参考答案】
strcpy(name, name);
address = new char[strlen( add) + 1];
strcpy(address, add);
38【参考答案】
(1)this->value = value;
(2)~MyClass()
(3)int MyClass::count = 0;
【参考答案】
(1)virtual void draw() const =0;
(2)const Point& pt
(3)double x_, y_;
(4)x_<< ','<< y_【参考答案】
for(int i = 0; i < M; i++)
for(int j = 0; j < i; j++)
{ int temp = array[i][j];
array[i][j] = array[j][i];
array[j][i] = temp; }
39【参考答案】
(1)char *Name;
(2)StudentInfo(char *name, int age, int ID, int courseNum, float record);
(3)~StudentInfo() { delete [] Name; }
【参考答案】
(1)virtual
(2)virtual
(3)itsLength(len), itsWidth(width)
(4)Shape* sp;
【参考答案】
n = r.n;
p = new int[n];
for (int index = 0; index < n; index++)
p[index] = r.p[index];
40【参考答案】
(1)Door(int n) : num(n), closed(true), locked(true) {}
(2)void open(){ // 开门
(3)if(!closed){
【参考答案】
(1)name
(2)n = p.birth_date.getMonth() - birth_date.getMonth()
(3)(is_male ? "男" : "女" )
(4)ps[m]

【参考答案】
for (int i = counter-1; i >= 0; i--)
if (elem[i] < 0) {
for (int j = i; j < counter-1; j++)
elem[j] = elem[j+1];
counter--; }

41 (1){ volume = 18; }
(2)channel = chan;
(3)void setVolumeTo(int vol){
【参考答案】
(1)x1(root1), x2(root2), num_of_roots(2)
(2)switch( num_of_roots
(3)a(x.a), b(x.b), c(x.c)
(4)return Root()
【参考答案】
int n = 0;
n = p.birth date.getYear() - birth date.getYear();
if (n != 0) return n;
n = p.birth date.getMonth() - birth date.getMonth();
if (n != 0) return n;
return p.birth date.getDay() - birth date.getDay();
42 (1)if ((++seconds) == 60) (2)return *this;
(3)show(++sw);
【参考答案】
(1)Person() (2)virtual void
(3): Person(s), gpa(g) (4)Person* p
【参考答案】
if (s == NULL) return true;
int len = strlen(s);
if (len > size) return false;
for (int i = 0; i < len; i++)
if ( str[i] != s[i])
return false; return true;
43【参考答案】
(1)Point(int x = 0, int y = 1)
(2)void move(int xOff, int yOff)
(3)p->print();
【参考答案】
(1)int[s]; (2)delete []a;
(3)a[num] (4)return a[i];
【参考答案】
if (str == NULL) return 0;
int counter = 1;
int length = strlen(str);
for (int i = 0; i < length; i++)
if (isspace(str[i]))
counter++;
return counter;

44 (1)bool isOn()const{ return intensity==1;} //返回电源开关状态
(2)void turnOff(){ intensity=0;} //关电扇
(3)intensity = inten;
【参考答案】
(1)num_pages(pages) {
(2)writer = new char[strlen(the_writer) + 1];
(3)Book(the_title, pages, the_writer) {
(4)a_book.theCourse();
【参考答案】
for (int i = 0; i <= end; i++)
{ a[i] = element[i];
size++; }
for (int k = 0; k <= set.GetEnd(); k++)
if (!IsMemberOf(set.GetElement(k)))
a[size++] = set.GetElement(k);
45 (1)title = new char[strlen(theTitle) + 1];
(2)bool isOpen()const{ return cur_page != 0;} //书打开时返回true,否则返回false
(3)cur_page = 0;
【参考答案】
(1)brand = new char[strlen(the_brand) + 1];
(2)strcpy(number, the_number);
(3)category()
(4)AutoMobile::show();
【参考答案】
int s size = strlen(s);
for (int i = 0; i < s size; i++)
if (str[size - s size + i] != s[i])
return false;
return true;
46【参考答案】
(1)return MyClass::v2; (2)int MyClass::v2 = 42;
(3)int v1 = obj.getValue()【参考答案】
(1)next(n), data(d) { }
(2)top->next;
(3)top++
(4)top->data;
【参考答案】
if (end < set.GetEnd())
return false;
for (int i = 0; i <= set.GetEnd(); i++)
if (!IsMemberOf(set.GetElement(i)))
return false;
return true;

47【参考答案】
(1)int val; (2)MyClass(int x) : data(x) {}
(3){ cout<< "The value of member object is "<< data.GetData()<< endl; }
【参考答案】
(1)arr[i] = sqr%10;
(2)k *= 10;
(3)n*n == rqs
【参考答案】
Matrix m;
for (int i = 0; i < M; i++)
for (int j = 0; j < N; j++)
m.setElement(i, j, (m1.getElement(i,j) + m2.getElement(i,j)));
return m;
【考点分析】
48【参考答案】
(1)MyClass() { value = 0; }
(2)void setValue(int val)
(3)int value;
【参考答案】
(1)virtual void
(2)virtual void
(3)vehicle(max_speed, weight), SeatNum(seat_num) {}
(4)public bicycle, public motorcar
【参考答案】
for (int i = 0; i < size; i++)
for (int j = i+1; j < size; j++)
if (data[i] > data[j])
swap(i, j);
49
【参考答案】
(1)char *Name;
(2)StudentInfo(char *name, int age, int ID, int courseNum, float record);
(3)void StudentInfo::show() const
【参考答案】
(1):x(xValue), y(yValue)