Lập trình hướng đối tượng C++

Tài liệu tham khảo công nghệ thông tin Lập trình hướng đối tượng C++

Giáo viên hướng dẫn : Nguyễn Đức Hiển

Sinh viên thực hiện : Nguyễn Tiến Hoài Nam Lớp : 06I

Câu 1:

void swap(int *a,int *b){ int c;

void main(){

clrscr();int a,b,i,j,n;int d[50];

cout<<"\nso phan tu cua day la n=";cin>>n;

cout<<"nhap so d["<<i<<"]=";cin>>d[i];

cout<<"day duoc sap sep tang dan :\n";for(i=1;i<=n;i++)

for(j=i+1;j<n+1;j++) if(d[i]>d[j])

swap(&d[i],&d[j]);for(i=1;i<=n;i++){

cout<<"\nday duoc sap sep giam dan :\n";for(i=1;i<=n;i++)

for(j=i+1;j<n+1;j++) if(d[i]<d[j])

swap(&d[i],&d[j]);for(i=1;i<=n;i++){

Câu 2:

struct PhanSo {

int TuSo; int MauSo; };

PhanSo operator + (PhanSo a ,PhanSo b);PhanSo operator - (PhanSo a ,PhanSo b);

PhanSo operator * (PhanSo a ,PhanSo b);PhanSo operator / (PhanSo a ,PhanSo b); int operator > (PhanSo a ,PhanSo b); int operator >=(PhanSo a ,PhanSo b); int operator < (PhanSo a ,PhanSo b); int operator <=(PhanSo a ,PhanSo b); int operator ==(PhanSo a ,PhanSo b); int operator !=(PhanSo a ,PhanSo b);

PhanSo RutGonPS (PhanSo a);}

void main() {

clrscr(); PhanSo a,b,c;

cout<<"Tu So a="; cin>>a.TuSo; cout<<"MauSo a="; cin>>a.MauSo; cout<<"Tu So b="; cin>>b.TuSo; cout<<"MauSo b="; cin>>b.MauSo; cout<<"\na="<<a.TuSo<<"/"<<a.MauSo; cout<<"\nb="<<b.TuSo<<"/"<<b.MauSo; c=a+b;

c=RutGonPS(c);

cout<<"\na+b="<<c.TuSo <<"/"<<c.MauSo; c=a-b;

c=RutGonPS(c);

cout<<"\na-b="<<c.TuSo <<"/"<<c.MauSo; c=a*b;

c=RutGonPS(c);

cout<<"\na*b="<<c.TuSo <<"/"<<c.MauSo; c=a/b;

c=RutGonPS(c);

cout<<"\na/b="<<c.TuSo <<"/"<<c.MauSo; if (a==b)

cout<<"\nPS a bang PS b"; else cout<<"\nPS b khac PS a"; if (a!=b)

cout<<"\nPS a khac PS b"; else cout<<"\nPS b bang PS a"; if (a>b)

cout<<"\nPS a lon hon PS b"; else if(b>a)

cout<<"\nPS b lon hon PS a"; else cout<<"\na=b";

if (a>=b)

cout<<"\nPS a lon hon hoac bang PS b"; else cout<<"\nPS b lon hon hoac bang PS a"; if (a<b)

cout<<"\nPS a be hon PS b"; else if (b<a)

cout<<"\nPS b be hon PS a"; else cout<<"\nb=a"; if (a<=b)

cout<<"\nPS a be hon hoac bang PS b"; else cout<<"\nPS b be hon hoac bang PS a"; getch();

// Dinh Nghia Cac Ham

PhanSo operator + (PhanSo a ,PhanSo b) {

PhanSo c;

c.TuSo=a.TuSo*b.MauSo+a.MauSo*b.TuSo; c.MauSo=a.MauSo*b.MauSo;

return c; }

PhanSo operator - (PhanSo a ,PhanSo b) {

PhanSo c;

c.TuSo=a.TuSo*b.MauSo-a.MauSo*b.TuSo; c.MauSo=a.MauSo*b.MauSo;

return c; }

PhanSo operator * (PhanSo a ,PhanSo b) {

PhanSo c;

c.TuSo=a.TuSo*b.TuSo; c.MauSo=a.MauSo*b.MauSo; return c;

}

PhanSo operator / (PhanSo a ,PhanSo b) {

PhanSo c;

c.TuSo=a.TuSo*b.MauSo; c.MauSo=a.MauSo*b.TuSo; return c;

}

int operator > (PhanSo a ,PhanSo b) {

if(a.TuSo*b.MauSo>b.TuSo*a.MauSo) return 1;

else return 0; }

int operator >= (PhanSo a ,PhanSo b) {

if(a.TuSo*b.MauSo>=b.TuSo*a.MauSo) return 1;

else return 0; }

int operator < (PhanSo a ,PhanSo b) {

if(a.TuSo*b.MauSo<b.TuSo*a.MauSo) return 1;

else return 0; }

int operator <= (PhanSo a ,PhanSo b) {

if(a.TuSo*b.MauSo<=b.TuSo*a.MauSo) return 1;

else return 0; }

int operator == (PhanSo a ,PhanSo b) {

if(a.TuSo*b.MauSo==b.TuSo*a.MauSo) return 1;

else return 0; }

int operator != (PhanSo a ,PhanSo b) {

if(a.TuSo*b.MauSo!=b.TuSo*a.MauSo)

return 1; else return 0; }

PhanSo RutGonPS (PhanSo a){

int UCLN;

int n=abs(a.TuSo),m=abs(a.MauSo); while (n != 0 && m != 0)

if (n>m) n -= m; else m -= n; if (n != 0) UCLN= n; else

UCLN= m;

a.TuSo=a.TuSo/UCLN; a.MauSo=a.MauSo/UCLN; return a;

Câu 3:

struct sophuc{

double thuc; double ao;};

sophuc lapsophuc(){

int x,y;sophuc tam;

tam.ao=y;return tam;}

void display(sophuc a){

sophuc operator + (sophuc a,sophuc b){

sophuc tam;

tam.thuc=a.thuc+b.thuc; tam.ao=a.ao+b.ao; return tam;

tam.ao= ((b.thuc*a.ao)-(a.thuc*b.ao))/((b.thuc*b.thuc)+(b.ao*b.ao));

}

return tam; }

int operator == (sophuc a,sophuc b){

return ((a.thuc==b.thuc)&&(a.ao==b.ao));}

int operator != (sophuc a,sophuc b){

return ((a.thuc!=b.thuc)||(a.ao!=b.ao));}

void main(){

sophuc x,y,z,t,s,r;cout<<"\nso phuc x:";x=lapsophuc();

cout<<"\nso phuc y:";y=lapsophuc();

cout<<"\ncong hai so phuc:";display(z);

public: char *ten;

float toan , ly ,hoa ,dtb; void nhap();

void xuat();

friend void hoanvi(float *a,float *b); };

void sinhvien::nhap(){

cout<<"vui long nhap cac thong tin sau :\n"; cout<<"ten sinh vien :";

cin>>ten;

cout<<"\ndiem toan :";

cin>>toan;

cout<<"\ndiem ly :"; cin>>ly;

cout<<"\ndiem hoa :"; cin>>hoa;

dtb=(toan+ly+hoa)/3;}

void sinhvien::xuat(){

cout<<"\nten sinh vien :"<<ten;

cout<<"\ndiem trung binh :"<<dtb<<"\n";}

void main(){

clrscr(); int i,j;

sinhvien a[10];

for(i=0;i<=9;i++) //nhap thong tin 10 sinh vien {

a[i].nhap(); }

for(i=0;i<=9;i++) //sap xep theo diem trung binh giam dan for(j=i+1;j<=10;j++)

if((a[i].dtb)<(a[j].dtb)) {

float c; char *tam; c=a[i].dtb; tam=a[i].ten; a[i].dtb=a[j].dtb; a[i].ten=a[j].ten; a[j].dtb=c; a[j].ten=tam; }

cout<<"3 SV co diem trung binh cao nhat la : \n";

for(i=0;i<=2;i++) //in ra man hinh 3 sinh vien co dtb cao nhat a[i].xuat();

getch();}

Câu 5:

class hcnhat

private:

int chdai,chrong; public:

void nhap(); int chuvi(); int dientich(); void xuat();};

void hcnhat::nhap(){

cout<<"nhap chieu dai :"; cin>>chdai;

cout<<"nhap chieu rong :"; cin>>chrong;

int hcnhat::chuvi(){

return (chdai+chrong)*2;}

int hcnhat::dientich(){

return chdai*chrong;}

void hcnhat::xuat(){

cout<<"chieu dai la :"<<chdai; cout<<"\nchieu rong la :"<<chrong; cout<<"\nchu vi hcn la :"<<chuvi(); cout<<"\ndien tich hcn la :"<<dientich();}

void main(){

clrscr(); hcnhat a; a.nhap(); a.xuat(); getch();}

Câu 6:

class phanso{

private:

int tuso, mauso; public:

void nhap();

friend phanso rutgon(phanso p);

friend phanso cong(phanso p1,phanso p2); friend phanso tru(phanso p1, phanso p2); friend phanso nhan(phanso p1,phanso p2); friend phanso chia(phanso p1,phanso p2); void xuat();

void phanso::nhap(){

phanso p1,p2;

cout<<"nhap tu so cua ps a :"; cin>>p1.tuso;

cout<<"\nnhap mau so cua ps a :"; cin>>p1.mauso;

cout<<"\nnhap tu so cua ps b :"; cin>>p2.tuso;

cout<<"\nnhap mau so cua ps b :"; cin>>p2.mauso;

int ucln(int x,int y){

x=abs(x);y=abs(y); if(x*y==0)

return 1; while(x!=y) if(x>y) x-=y; else y-=x; return x;}

phanso rutgon(phanso p){

phanso q; int x;

x=ucln(p.tuso,p.mauso); q.tuso=p.tuso/x;

q.mauso=p.mauso/x; return q;

phanso cong(phanso p1,phanso p2){

p1.tuso=p1.tuso*(p2.mauso) + p2.tuso*(p1.mauso); p1.mauso=p1.mauso*p2.mauso;

return rutgon(p1);

phanso tru(phanso p1,phanso p2){

p1.tuso=p1.tuso*p2.mauso - p2.tuso*p1.mauso; p1.mauso=p1.mauso*p2.mauso;

return rutgon(p1);}

phanso nhan(phanso p1,phanso p2){

p1.tuso=p1.tuso*p2.tuso;

p1.mauso=p1.mauso*p2.mauso; return rutgon(p1);

phanso chia(phanso p1,phanso p2){

p1.tuso=p1.tuso*p2.mauso; p1.mauso=p1.mauso*p2.tuso; return rutgon(p1);

void phanso::xuat(){

phanso p1,p2,c,t,n,ch; c=cong(p1,p2); t=tru(p1,p2); n=nhan(p1,p2); ch=chia(p1,p2);

cout<<"\na+b="<<c.tuso<<"/"<<c.mauso; cout<<"\na-b="<<t.tuso<<"/"<<t.mauso; cout<<"\na*b="<<n.tuso<<"/"<<n.mauso; cout<<"\na : b="<<ch.tuso<<"/"<<ch.mauso;}

void main(){

clrscr(); phanso a; a.nhap(); a.xuat(); getch();}

Câu 7:

class sophuc{

private:

double thuc;double ao; public:

void nhap() {

cout<<"\nthuc="; cin>>thuc;

cout<<"\nao="; cin>>ao;

}

void in(sophuc a) {

cout<<"("<<a.thuc<<","<<a.ao<<")"<<endl; }

sophuc operator + ( sophuc a) {

sophuc tam;

tam.thuc=this->thuc+a.thuc; tam.ao =this->ao+a.ao; return tam;

tam.ao=

return tam; }

int operator == (sophuc a) {

return ((this->thuc==a.thuc)&&(this->ao==a.ao)); }

int operator != (sophuc a) {

return ((this->thuc!=a.thuc)||(this->ao!=a.ao)); }

};void main(){

clrscr(); sophuc a,b,c;

cout<<"\nsophuc a"; a.nhap();

cout<<"\nsophuc b"; b.nhap();

c=a+b;

cout<<"\na+b=" ; c.in(c); c=a-b;

cout<<"\na-b="; c.in(c); c=a*b;

cout<<"\na*b="; c.in(c); c=a/b;

cout<<"\na/b="; c.in(c); if(a==b)

cout<<"\nhai so phuc bang nhau"; else

cout<<"\nhai so phuc khong bang nhau"; if(a!=b)

cout<<"\nhai so phuc khac nhau"; else

cout<<"\nhai so phuc khong khac nhau";getch();

Câu 8:

struct matran{

double mt[20][20];

int n;};

ostream& operator <<(ostream& os, const matran& x){

os<<setprecision(2)<<setiosflags(ios::showpoint); for(int i=1;i<=x.n;++i)

{

os<<"\n";

for(int j=1;j<=x.n;++j) os<<setw(6)<<x.mt[i][j]; }

os<<"\n"; return os;}

istream& operator>>(istream& is,matran& x){

cout<<"cap ma tran vuong:"; is>>x.n;

cout<<"nhap cac phan tu :\n"; for(int i=1;i<=x.n;++i)

for(int j=1;j<=x.n;++j) {

cout<<"a["<<i<<"]["<<j<<"]="; is>>x.mt[i][j];

}

return is;}

matran operator +(matran a, matran b){ matran c;

for(int i=1;i<=a.n;++i) for(int j= 1;j<=a.n;++j)

c.mt[i][j]= a.mt[i][j] + b.mt[i][j];return c;

matran operator -(matran a,matran b){ matran c;

int i,j; if(a.n!=b.n) {

cout<<"\nkhong thuc hien duoc phep tru vi 2 MT khong cung cap"; getch();

return a; }

else

for(i=1;i<=a.n;++i) for(j= 1;j<=a.n;++j)

c.mt[i][j]= a.mt[i][j] - b.mt[i][j];

return c;}

matran operator *(matran a, matran b){

if(a.n!=b.n) {

cout<<"\nkhong thuc hien duoc phep nhan vi 2 MT khong cung cap"; getch();

return a; }

else {

matran c; int i,j,k;

for(i=1;i<=a.n;++i) for(j=1;j<=a.n;++j) {

c.mt[i][j]=0.0;

for(k=1;k<=a.n;++k)

c.mt[i][j]+=a.mt[i][k]*b.mt[k][i]; }

return c; }

void main(){

clrscr();

matran a,b,c,d,e; int n,i,j;

cout<<"\nnhap ma tran A";cin>>a;cout<<"\nnhap ma tran B";cin>>b;c = a+b;

cout<<"\nket qua A + B :"; for(i=1;i<=a.n;++i)

for(j=1;j<=a.n;++j)

cout<<"\tc["<<i<<"]["<<j<<"]="<<c.mt[i][j];d=a-b;

cout<<"\nket qua A - B :"; for(i=1;i<=a.n;++i)

for(j=1;j<=a.n;++j)

cout<<"\td["<<i<<"]["<<j<<"]="<<d.mt[i][j];e=a*b;

cout<<"\nket qua A * B :"; for(i=1;i<=a.n;++i)

for(j=1;j<=a.n;++j)

cout<<"\te["<<i<<"]["<<j<<"]="<<e.mt[i][j];getch();

Câu 9:

class point {

private:

int x,y; // hoanh do va tung do public:

void nhap() {

cout<< "\nhoanh do va tung do cua diem:" ; cin>>x>>y;

}

void xuat() {

cout<<x<<","<<y; }

double do_dai(point n) {

return sqrt(pow(x-n.x,2)+pow(y-n.y,2)); }

}; void main() {

clrscr(); point a,b; double c;

cout<<"\ntoa do diem a :"; a.nhap();

cout<<"\ndiem a:"; a.xuat();

cout<<"\ntoa do diem b:"; b.nhap();

cout<<"\ndiem b:"; a.xuat();

c= a.do_dai(b);

cout<<" \ndo dai giua hai diem:"; cout<<c;

getch(); }

Câu 10:

class DIEM

int x,y;public :

DIEM(int x1,int y1){

DIEM(DIEM &d){

int operator[](int i){

if(i==1)return x;else return y;}

class DUONG_TRON:public DIEM{

int r,md;public:

DUONG_TRON(DIEM d,int r1, int md1):DIEM(d){

void ve(){

int getmd(){

return md;}

void ktdh(){

int mh=0,mode=0;

initgraph(&mh,&mode,"");

void main(){

DUONG_TRON dt(DIEM(100,100),80,MAGENTA);dt.ve();

Câu 11:

class DIEM{

private :

double x,y; public :

DIEM() {

x=y=0.0; }

DIEM(double x1,double y1) {

x=x1;y=y1; }

void in() {

cout<<"\nx="<<x<<" y="<<y; }

class HINH_TRON : public DIEM{

private :double r; public :

HINH_TRON() {

r=0.0; }

HINH_TRON(double x1,double y1,double r1):DIEM(x1,y1){

r=r1;}

double getR() {

return r; }

};

void main(){

HINH_TRON h(2.5,3.5,8); clrscr();

cout<<"\nHinh tron co tam :"; h.in();

cout<<"\nCo ban kinh ="<<h.getR(); getch();

Câu 12:

class nguoi{

private: char *ten; char *diachi; int ns; // nam sinh public:

nguoi() {

}

nguoi(char *ten1, char *diachi1, int ns1) {

int n=strlen(ten1);ten =new char[n+1];strcpy(ten,ten1);int m=strlen(diachi1);diachi =new char[m+1];strcpy(diachi,diachi1);ns=ns1;

}

~nguoi() {

if((ten!=NULL)&&(diachi!=NULL)){

delete ten;delete diachi;ns=0;

} }

void xuat() {

cout<<"\nho va ten:"<<ten<<"\nnam sinh:"<<ns<<"\ndiachi:"<<diachi; }

};

class mon_hoc{

private:

char*mon; int sotiet; public: mon_hoc() {

mon=NULL;sotiet=0; }

mon_hoc(char*mon1,int sotiet1) {

int n=strlen(mon1);mon=new char[n+1];strcpy(mon,mon1);sotiet=sotiet1; }

~mon_hoc() {

if(mon!=NULL)delete mon;sotiet=0; }

void xuat() {

cout<<"\nTen mon hoc:"<<mon<<"\nSo tiet hoc:"<<sotiet; }

giao_vien():nguoi(),mh() {}

giao_vien(char*ten1,char*diachi1,int ns1,char*mon1,int sotiet1):nguoi(ten1,diachi1,ns1),mh(mon1,sotiet1)

{}

~giao_vien() {}

void xuat() {

nguoi::xuat() ;mh.xuat(); }

};

void main(){

_♠The End♠