| Name |
Code |
Binary Search
|
#include < iostream.h >
template < class T >
int binarySearch(T a[], int n, T & x)
{
int left = 0; // left end of segment
int right = n - 1; // right end of segment
while (left <= right)
{
int middle = (left + right)/2; // middle of segment
if (x == a[middle])
return middle;
if (x > a[middle])
left = middle + 1;
else
right = middle - 1;
}
return -1; // x not found
}
int main()
{
int a[10],n,t;
cout<<"Enter the size:";
cin>>n;
cout<<"enter the elements in sorted order:";
for(int i=0;i< n;i++)
cin >>a[i];
cout<<"enter the element to search:";
cin>>t;
int f=binarySearch(a,n,t);
if(f==-1)
cout<<"element not found";
else
cout<<"element found at index:"< }
|
Complex Number
|
#include<iostream.h>
#include<conio.h>
class complex
{
private:
float real,img;
public:
void assign(float x,float y)
{
real=x;
img=y;
}
void print()
{
if(img>=0)
cout<< real<<"+"<< img<<"i";
else
cout<< real<< img<<"i";
getch();
}
};
void add( float a,float b,float c, float d)
{
float e,f;complex g;
e=a+c;
f=b+d;
g.assign(e,f);
g.print();
}
void sub( float a,float b,float c, float d)
{
float e,f;complex g;
e=a-c;
f=b-d;
g.assign(e,f);
g.print();
}
void mul( float a,float b,float c, float d)
{
float e,f; complex g;
e=a*c-b*d;
f=b*c+a*d;
g.assign(e,f);
g.print();
}
void main()
{
float a,b,c,d;
complex x,y,z;
clrscr();
cout<<" for complex 1:";
cout<<"real part:";
cin>>a;
cout<<"imaginary part:";
cin>>b;
cout<<" for complex 2:";
cout<<"real part:";
cin>>c;
cout<<"imaginary part:";
cin>>d;
x.assign(a,b);
y.assign(c,d);
cout<<"***original data:***\n";
cout<<"Complex 1:\n";x.print();
cout<<"\n Complex 2:\n";y.print();
cout<<"\n***\n";
cout<<"\n Addition:\n";add(a,b,c,d);
cout<<"\n Subtraction:\n";sub(a,b,c,d);
cout<<"\n Multipication:\n";mul(a,b,c,d);
}
|
Constructor and Destructor
|
#include <iostream>
using namespace std;
#define SIZE 10
class stack
{
int stck[SIZE];
int topOfStack;
public:
stack(); // constructor
~stack(); // destructor
void push(int i);
int pop();
};
// constructor
stack::stack()
{
topOfStack = 0;
cout << "Stack Initialized\n";
}
// destructor
stack::~stack()
{
cout << "Stack Destroyed\n";
}
void stack::push(int i)
{
if( topOfStack == SIZE )
{
cout << "Stack is full.\n";
return;
}
stck[ topOfStack ] = i;
topOfStack++;
}
int stack::pop()
{
if( topOfStack == 0 )
{
cout << "Stack underflow.\n";
return 0;
}
topOfStack--;
return stck[ topOfStack ];
}
int main()
{
stack a, b;
a.push(1);
b.push(2);
a.push(3);
b.push(4);
cout << a.pop() << " ";
cout << a.pop() << " ";
cout << b.pop() << " ";
cout << b.pop() << endl;
return 0;
}
|
Convert Temperatures from Celsius to Fahrenheit and vice versa.
|
#include <iostream.h>
#include <conio.h>
void main()
{
clrscr();
int choice;
float ctemp,ftemp;
cout << "1.Celsius to Fahrenheit" << endl;
cout << "2.Fahrenheit to Celsius" << endl;
cout << "Choose between 1 & 2 : " << endl;
cin>>choice;
if (choice==1)
{
cout << "Enter the temperature in Celsius : " << endl;
cin>>ctemp;
ftemp=(1.8*ctemp)+32;
cout << "Temperature in Fahrenheit = " << ftemp << endl;
}
else
{
cout << "Enter the temperature in Fahrenheit : " << endl;
cin>>ftemp;
ctemp=(ftemp-32)/1.8;
cout << "Temperature in Celsius = " << ctemp << endl;
}
getch();
}
|
Copy One File to another File
|
#include < iostream.h >
#include < conio.h >
#include < iomanip.h >
#include < stdlib.h >
#include < ctype.h >
#include < fstream.h >
void main( )
{
ofstream outfile;
ifstream infile;
char fname1[10],fname2[20];
char ch,uch;
clrscr( );
cout<<"Enter a file name to be copied ";
cin>> fname1;
cout<<"Enter new file name";
cin>>fname2;
infile.open(fname1);
if( infile.fail( ) )
{
cerr<< " No such a file Exit";
getch();
exit(1);
}
outfile.open( fname2);
if(outfile.fail( ))
{
cerr<<"Unable to create a file";
getch();
exit(1);
}
while( !infile.eof( ) )
{
ch = (char) infile.get( );
uch = toupper(ch);
outfile.put(uch);
}
infile.close( );
outfile.close( );
getch( );
}
|
Data Abstraction
|
#include <iostream>
using namespace std;
class Adder
{
public:
// constructor
Adder(int i = 0)
{
total = i;
}
// interface to outside world
void addNum(int number)
{
total += number;
}
// interface to outside world
int getTotal()
{
return total;
};
private:
// hidden data from outside world
int total;
};
int main( )
{
Adder a;
a.addNum(10);
a.addNum(20);
a.addNum(30);
cout << "Total " << a.getTotal() <<endl;
return 0;
}
|
Data Encapsulation
|
#include <iostream>
using namespace std;
class Adder
{
public:
// constructor
Adder(int i = 0)
{
total = i;
}
// interface to outside world
void addNum(int number)
{
total += number;
}
// interface to outside world
int getTotal()
{
return total;
};
private:
// hidden data from outside world
int total;
};
int main( )
{
Adder a;
a.addNum(10);
a.addNum(20);
a.addNum(30);
cout << "Total " << a.getTotal() <<endl;
return 0;
}
|
Enum example
|
#include <iostream.h>
int main()
{
enum Days{Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday};
Days TheDay;
int j;
cout<<"Please enter the day of the week (0 to 6)";
cin>>j;
TheDay = Days(j);
if(TheDay == Sunday || TheDay == Saturday)
cout<<"Hurray it is the weekend"< else
cout<<"Curses still at work"< return 0;
}
|
Euclid's algorithm
|
#include <iostream.h>
// Fundamental idea of Euclid's algorithm (one of the oldest known algorithms)
// gcd(a,0) = a
// gcd(a,b) = gcd(b,a%b)
int gcd (int a, int b)
{
int temp;
while (b != 0)
{
temp = a % b;
a = b;
b = temp;
}
return(a);
}
int main ()
{
int x, y;
cout << "Enter two natural numbers: ";
cin >> x >> y;
cout << "gcd(" << x << ", " << y << ") = " << gcd(x,y) << endl;
return(0);
}
|
Exception Handling
|
#include <iostream>
using namespace std;
int main()
{
unsigned int TypeOfLoan = 0;
const char *LoanType[] =
{ "Personal",
"Car",
"Furniture",
"Musical Instrument",
"Boat"
};
try
{
cout << "Enter the type of loan\n";
for(int i = 0; i < 4; i++)
cout << i + 1 << ") " << LoanType[i] << endl;
cout << "Your choice: ";
cin >> TypeOfLoan;
if( TypeOfLoan < 1 || TypeOfLoan > 5 )
throw "Number out of range\n";
cout << "\nType of Loan: " << LoanType[TypeOfLoan] << endl;
}
catch(const char* Msg)
{
cout << "Error: " << Msg << endl;
}
catch(...)
{
cout << "\nSomething went wrong\n\n";
}
return 0;
}
|
Reviewed by Abdul hanan
on
05:06:00
Rating:
