bài công nhân

#include<conio.h>

#include<stdio.h>

#include<string.h>

#include<iostream.h>

class congnhan

{

private:

char *hoten;

float hesoluong;

int namsinh;

public:

~congnhan(){if (this->hoten!=NULL)

delete (this->hoten);}

float gethesoluong(){

return this->hesoluong;

}

congnhan &operator =(congnhan & w);

friend istream & operator >>(istream & input,congnhan & w);

friend ostream & operator <<(ostream & output,congnhan w);

float tinhluong(int luongcoban=45);

};

istream & operator >>(istream & input,congnhan & w)

{

cout<<"nhap hoten:";

if(w.hoten==NULL)

w.hoten=new char[30];

fflush(stdin);

gets(w.hoten);

cout<<"nhap namsinh:";input>>w.namsinh;

cout<<"nhap hesoluong:";input>>w.hesoluong;

return input;

}

ostream & operator <<(ostream & output,congnhan w)

{

output<<"hoten:"<<w.hoten<<"\t namsinh:"<<w.namsinh<<"\thesoluong:"<<w.hesoluong;

return output;

}

float congnhan::tinhluong(int luongcoban)

{

float luong;

luong=hesoluong*luongcoban;

return luong;

}

congnhan& congnhan::operator =(congnhan &w)

{

if (this->hoten==NULL)

this->hoten= new char[strlen(w.hoten)];

strcpy(this->hoten, w.hoten);

this->namsinh=w.namsinh;

this->hesoluong=w.hesoluong;

return *this;

}

void main()

{

congnhan a[100];

int i,n;

float luong;

clrscr();

cout<<"

nhap bao nhieu cong nhan:";cin>>n;

for(i=0;i<n;i++)

{

cin>>a[i];

}

cout<<"

danh sach vua nhap la:"<<"

";

for(i=0;i<n;i++)

{

cout<<"

cong nhan thu "<<i<< "la:";

cout<<a[i];

}

cout<<"

luong cong nhan:";

for(i=0;i<n;i++)

{

luong=a[i].tinhluong();

cout<<luong;

}

getch();

}

bài vẽ hình chữ nhật

//Ve hinh chu nhat

#include<iostream.h>

#include<graphics.h>

#include<conio.h>

class cn

{

private:

int x1,y1, rong, dai,maunen;

public:

//void vecn(int x1, int y1,int rong, int dai);

void vecn();

void nhap();

};

void cn::vecn()

//void cn::vecn(int x1, int y1, int rong, int dai)

{

clrscr();

int gdriver=DETECT, gmode, errorcode;

int x2,y2;

initgraph (&gdriver, &gmode,"C:\\Laptrinh\\TC\\BGI");

errorcode=graphresult();

if(errorcode != grOk)

{

cout << "Loi do hoa" << grapherrormsg(errorcode);

cout << "An nut bat ki de thoat ra:";

getch();

// exit (1);

}

x2=this->x1+this->dai;

y2=this->y1+this->rong;

setbkcolor(this->maunen);

bar(this->x1,this->y1,x2,y2);

getch();

closegraph();

}

void cn::nhap()

{

cout << "

Nhap toa do diem x tren ben trai:";

cin >> this->x1;

cout << "

Nhap toa do diem y tren ben trai:";

cin >> this->y1;

cout << "

Nhap chieu rong:";

cin >> this->rong;

cout << "

Nhap chieu dai:";

cin >> this->dai;

cout << "

Nhap mau nen:";

cin >> this->maunen;

}

void main()

{

clrscr();

cn a;

a.nhap();

a.vecn();

getch();

}

bàihình chữ nhật

/#include<conio.h>

#include<stdio.h>

#include<iostream.h>

#include<graphics.h>

class hcn

{

int top,left,width,height,bgcolor;

public:

hcn(){

this->top=100;

this->left=100;

this->width=100;

this->height=100;

}

hcn::hcn(int top,int left,int width,int height,int backgroundcolor){

this->top=top;

this->left=left;

this->width=width;

this->height=height;

this->bgcolor=backgroundcolor;

}

void ve();

};

void hcn::ve(){

int gdriver = DETECT,gmode,errorcode;

initgraph(&gdriver,&gmode ,"C:\\LAPTRINH\\TC\\BGI");

errorcode=graphresult();

if (errorcode==grOk){

//rectangle(left, top, left+width, top+height);

setfillstyle(SOLID_FILL, this->bgcolor);

bar(left, top, left+width, top+height);

}else{

cout<<"

Loi khoi tao che do Do hoa";

}

getch();

closegraph();

}

void main(){

hcn a(100, 250, 300, 100, RED);

a.ve();

}

bài phân số

#include<conio.h>

#include<iostream.h>

#include<math.h>

#include<iomanip.h>

#include<stdlib.h>

#include<stdio.h>

class PS

{ public:

int ts,ms;

friend ostream& operator <<(ostream& os,PS &p)

{ if(p.ms == 1) os<<"

"<<p.ts;

else

{ if(p.ts==0) os<<"

0";

else os<<p.ts<<"/"<<p.ms;

}

return os;

};

friend istream& operator >>(istream& is,PS &p)

{ cout<<"

Tu:";is>>p.ts;

cout<<"Mau:";is>>p.ms;

return is;

};

int ucln();

PS rutgon();

void hien_hon_so();

PS operator +(PS p2);

PS operator -(PS p2);

PS operator *(PS p2);

PS operator /(PS p2);

int operator ==(PS ps2);

int operator !=(PS ps2);

int operator >(PS ps2);

int operator >=(PS ps2);

int operator <(PS ps2);

int operator <=(PS ps2);

void ghitep();

void doctep();

};

int uscln(int a, int b)

{

int du;

while (b!=0)

{

du= a%b;

a=b;

b=du;

}

return a;

}

PS PS::rutgon()

{

int x;

x=ucln();

ts=ts/x;

ms=ms/x;

if(ms<0){ ts=-ts;ms=-ms; }

return (*this);

};

void PS::hien_hon_so()

{ int nguyen;

PS a;

nguyen=ts/ms;

a.ts=ts-(nguyen*ms);

a.ms=ms;

if(nguyen!=0)

cout<<"("<<nguyen<<")";

cout<<a;

};

PS PS::operator +(PS p2)

{

PS q;

q.ts=ts*p2.ms+ms*p2.ts;

q.ms=ms*p2.ms;

return q.rutgon();

};

PS PS::operator -(PS p2)

{

PS q;

q.ts=ts*p2.ms-ms*p2.ts;

q.ms=ms*p2.ms;

return q.rutgon();

};

PS PS::operator *(PS p2)

{

PS q;

q.ts=ts*p2.ts;

q.ms=ms*p2.ms;

return q.rutgon();

};

PS PS::operator /(PS p2)

{

PS q;

q.ts=ts*p2.ms;

q.ms=ms*p2.ts;

return q.rutgon();

}

int PS::operator ==(PS ps2)

{

if( (ts*ps2.ms-ms*ps2.ts)==0 ) return 1; //TRUE dung

else return 0; //FALSE sai

};

int PS::operator !=(PS ps2)

{

if( (ts*ps2.ms-ms*ps2.ts)!=0 ) return 1; //TRUE dung

else return 0; //FALSE sai

};

int PS::operator >(PS ps2)

{

float kt=(float) (ts*ps2.ms-ms*ps2.ts)/(ms*ps2.ms);

if(kt>0) return 1; //TRUE dung

else return 0; //FALSE sai

};

int PS::operator >=(PS ps2)

{

float kt=(float) (ts*ps2.ms-ms*ps2.ts)/(ms*ps2.ms);

if(kt>=0) return 1; //TRUE dung

else return 0; //FALSE sai

};

int PS::operator <(PS ps2)

{

float kt=(float) (ts*ps2.ms-ms*ps2.ts)/(ms*ps2.ms);

if(kt<0) return 1; //TRUE dung

else return 0; //FALSE sai

};

int PS::operator <=(PS ps2)

{

float kt=(float) (ts*ps2.ms-ms*ps2.ts)/(ms*ps2.ms);

if(kt<=0) return 1; //TRUE dung

else return 0; //FALSE sai

};

void PS::ghitep()

{

FILE *f;

f=fopen("phanso.dat","a+b");

if(f==NULL)

{

cout<<"loi mo tep!";

getch();

}

else fwrite(this,sizeof(*this),1,f);

fclose(f);

};

void PS::doctep()

{

FILE *f=fopen("phanso.dat","r+b");

if(f==NULL)

{

cout<<"loi mo tep!";

getch();

}

else

while( fread(this,sizeof(*this),1,f)!=NULL )

cout<<*this;

fclose(f);

};

int menu()

{

int chon;

clrscr();

cout<<"

";

cout<<"

*-*-*-*-*-*- XAY DUNG LOP PHAN SO *-*-*-*-*-*-*-*-* ";

cout<<"

";

cout<<"

* CHUC NANG CHUONG TRINH *";

cout<<"

------------------------------";

cout<<"

| 1.SO SANH |";

cout<<"

| 2.DOI RA HON SO |";

cout<<"

| 3.RUT GON PHAN SO |";

cout<<"

| 4.CAC PHEP TINH TREN PHAN SO |";

cout<<"

| 0.THOAT |";

cout<<"

------------------------------";

cout<<"

MOI CHON CHUC NANG: ";

cin>>chon;

return chon;

};

void main()

{

int chon=1;

int u;

PS g,h;

while(chon)

{

chon=menu();

switch(chon)

{

case 1:

{

clrscr();

cout<<endl<<"Nhap phan so g:"<<endl;

cin>>g;

g.ghitep();g.rutgon();

cout<<"

nhap phan so h: ";

cin>>h;

h.ghitep();h.rutgon();

if(h<g)

cout<<h<<"<"<<g;

else if(h>g)

cout<<h<<">"<<g;

else

cout<<h<<"="<<g;

getch();break;

}

case 2:

{

clrscr();

cout<<"

phan so g"<<endl;

cin>>g;g.ghitep();

g.rutgon();g.hien_hon_so();

getch();

break;

}

case 3:

{ clrscr();

cout<<endl<<"nhap phan so: "<<endl;

cin>>g;

g.rutgon();

cout<<"

phan so sau khi rut gon:"<<g;getch(); break;

}

case 4:

{

clrscr();

cout<<endl<<"1.NHAN 2 PS";

cout<<endl<<"2.CHIA 2 PS";

cout<<endl<<"3.CONG 2 PS";

cout<<endl<<"4.TRU 2 PS";

cout<<endl<<"VUI LONG CHON 1 CHUC NANG: ";

cin>>u;

switch(u)

{

case 1:

{

PS kq;

clrscr();

cout<<endl<<"Nhap phan so g:"<<endl;

cin>>g;

g.ghitep();g.rutgon();

cout<<"

nhap phan so h: ";

cin>>h;

h.ghitep();h.rutgon();

kq=g*h;

cout<<"tich 2 PS vua nhap la: "<<kq;getch(); break;

}

case 2:

{

PS kq2;

clrscr();

cout<<endl<<"Nhap phan so g:"<<endl;

cin>>g;

g.ghitep();g.rutgon();

cout<<"

nhap phan so h: ";

cin>>h;

h.ghitep();h.rutgon();

kq2=g/h;

cout<<"chia 2 PS vua nhap la: "<<kq2;getch(); break;

}

case 3:

{

PS KQ3;

clrscr();

cout<<endl<<"Nhap phan so g:"<<endl;

cin>>g;

g.ghitep();g.rutgon();

cout<<"

nhap phan so h: ";

cin>>h;

h.ghitep();h.rutgon();

KQ3=g+h;

cout<<"cong 2 PS vua nhap la: "<<KQ3;getch(); break;

}

case 4:

{

PS KQ4;

clrscr();

cout<<endl<<"Nhap phan so g:"<<endl;

cin>>g;

g.ghitep();g.rutgon();

cout<<"

nhap phan so h: ";

cin>>h;

h.ghitep();h.rutgon();

KQ4=g-h;

cout<<"hieu 2 da thuc vua nhap la: "<<KQ4;getch(); break;

}

case 0:

{

break;

}

}

}

}

}

}

bài phân số

#include <conio.h>

#include <stdio.h>

#include <math.h>

#include <iostream.h>

class phanso

{

private:

int tu;

int mau;

public:

phanso()

{

this->tu=0;

this->mau=1;

}

phanso(int tu)

{

this->tu=tu;

this->mau=1;

}

phanso(int tu1, int mau1)

{

this->tu=tu1;

this->mau=mau1;

}

phanso operator - (phanso p)

{

phanso q;

q.tu=(this->tu*p.mau)-(this->mau*p.tu);

q.mau=this->mau*p.mau;

return q;

}

phanso operator + (phanso p)

{

phanso q;

q.tu=(this->tu*p.mau)+(this->mau*p.tu);

q.mau=this->mau*p.mau;

return q;

}

friend ostream &operator <<(ostream&output, phanso a)

{

cout<<a.tu<<"/"<<a.mau;

return output;

}

};

void main()

{

clrscr();

phanso a(2);

phanso b(1,3);

phanso c(2,5);

phanso d(1,2);

phanso tong;

tong=a+b+c-d;

cout<<"

";

cout<<a<<b<<c<<d;

cout<<" Ket qua cua bieu thuc:2+ 1/3 + 2/5 - 1/2 ="<<tong;

getch();

}

bài công nhân

/* Xay dung lop Cong nhan voi cac thanh phan

-Thuoc tinh: Hoten, Hesoluong

-Phuong thuc: Nhap(), Hien, Tinhluong(long Luongcoban=450000)

+Lap trinh nhap vao danh sach 10 CN

+Hien danh sach ra man hinh (Hoten, Luong)

+Tinh tong so luong phai tra */

#include<stdio.h>

#include<conio.h>

#include<string.h>

#include<iostream.h>

class congnhan

{

private:

char hoten[20];

float hesoluong;

public:

void nhap();

void hien();

float tinhluong(long luongcoban=450000); //CHU Y: De phong tran so!

};

void congnhan :: nhap()

{

cout << "

Ho ten: ";

fflush(stdin);

gets(this->hoten);

cout << "

He so luong: ";

cin>> this->hesoluong;

}

void congnhan :: hien()

{

cout << this->hoten << "\t" << this->hesoluong << "\t" << tinhluong() << endl;

}

float congnhan :: tinhluong(long luongcoban)

{

return this->hesoluong*luongcoban;

}

void main()

{

clrscr();

long tong=0;

congnhan a[100];

for(i=0;i<10;i++)

{

a[i].nhap();

a[i].hien();

}

for(i=0;i<10;i++)

tong += a[i].tinhluong(); //Co the truyen doi so khac vao hoac neu khong truyen thi se lay tham so mac dinh cua phuong thuc

cout << "

Tong luong phai tra la: " << tong;

getch();

}

bài đa thức

#include <iostream.h>

#include <conio.h>

#include <math.h>

class DT{

private:

double *a;

public:

DT(){

this->n = 0;

this->a = NULL;

}

DT( int n1 ){

this->n = n1;

this->a = new double[n1 + 1];

}

~DT(){

this->n = 0;

delete []this->a;

}

DT( const DT &d ){

this->n = d.n;

this->a = new double[d.n + 1];

for( int i = 0; i < n; i++ ){

a[i] = d.a[i];

}

}

friend ostream& operator<<( ostream& os, const DT &d );

friend istream& operator>>( istream& is, DT &d );

DT operator-();

DT operator+( const DT &d2 );

DT operator*( const DT &d2 );

DT operator-( const DT &d2 );

double operator^( const double &x );

double operator[]( int i ){

return a[i];

}

};

ostream& operator<<( ostream& os, const DT &d ){

os<<"-Cac he so ( tu ao ): ";

for( i = 0; i <= d.n; ++i ){

os<<d.a[i]<<" ";

}

return os;

}

istream& operator>>( istream& is, DT &d ){

if( d.a != NULL )

delete []d.a;

cout<<"-Bac cua da thuc: ";

cin>>d.n;

d.a = new double[d.n + 1];

cout<<"Nhap he so da thuc:

";

for( int i = 0; i <= d.n; ++i ){

cout<<"He so bac "<< i<<" = ";

is>>d.a[i];

}

return is;

}

DT DT::operator-(){

DT p( this->n );

for( int i = 0; i <= n; ++i ){

p.a[i] = -a[i];

}

return p;

}

DT DT::operator+( const DT &d2 ){

int i, k;

k = n > d2.n ? n : d2.n;

DT d( k );

for( i = 0; i <= k; ++i ){

if( i <= n && i <= d2.n )

d.a[i] = a[i] + d2.a[i];

else if( i <= n )

d.a[i] = a[i];

else

d.a[i] = d2.a[i];

}

return d;

}

DT DT::operator-( const DT &d2 ){

int i, k;

k = n > d2.n ? n : d2.n;

DT d( k );

for( i = 0; i <= k; ++i ){

if( i <= n && i <= d2.n )

d.a[i] = a[i] - d2.a[i];

else if( i <= n )

d.a[i] = a[i];

else

d.a[i] = d2.a[i];

}

return d;

}

DT DT::operator*( const DT &d2 ){

int k, i, j;

k = n + d2.n;

DT d( k );

for( i = 0; i <= k; ++i ){

d.a[i] = 0;

}

for( i = 0; i <= n; ++i )

for( j = 0; j <= d2.n; j++ )

d.a[i+j] += a[i]*d2.a[j];

return d;

}

double DT::operator^( const double &x ){

double s = 0.0, t = 1.0;

for( int i = 0; i <= n; ++i ){

s += a[i] * t;

t *= x;

}

return s;

}

int main(){

DT g, h, f, y, z, f1, f2;

cout<<"

Nhap da thuc G :";

cin>>g;

cout<<"

Da thuc G :"<<g;

/*cout<<"

Nhap da thuc H :";

cin>>h;

cout<<"

Da thuc H :"<<h;

cout<<"

Nhap da thuc Y :";

cin>>y;

cout<<"

Da thuc Y :"<<y;

cout<<"

Nhap da thuc Z :";

cin>>z;

cout<<"

Da thuc X :"<<z;*/

f1 = -g;

//f2 = y - z;

//f = f1 * f2;

cout<<"

Da thuc F1 :"<<f1;

//cout<<"

Da thuc F2 :"<<f2;

//cout<<"

Da thuc F :"<<f;

getch();

return 0;

}