C++ programs :-

 

bullet /*CONVERSION OF DECIMAL NUMBER TO BINARY NUMBER*/




#include<iostream.h>
#include<math.h>
void main()
{
int b=0,d,i,n;
cout<<"enter the decimal no\n";
cin>>d;
for(i=0;d!=0;d/=2,i++)
{b+=(d%2)*pow(10,i);
}
cout<<"the binary no. is\n"<<b;
}

 

bullet /*SORTING OF ELEMENTS IN AN ARRAY*/


#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
const int n=10;
int arr[n],temp,s,k,smallest,loc;
cout<<"ENTER THE "<<n<<" ELEMENTS SEPARATED BY SPACE\n";
for(int j=0;j<n;j++)
cin>>arr[j];
cout<<"\nTHE ELEMENTS ENTERED ARE :"<<'\n';
for(k=0;k<n;k++)
cout<<arr[k]<<" ";
/*THIS SORTS THE ELEMENT*/
for(k=0;k<n-1;k++)
{
smallest=arr[k];loc=k;
for(j=k;j<n;j++)
{
if(smallest>arr[j])
{
smallest=arr[j];loc=j;
}
}
temp=arr[k];
arr[k]=arr[loc];
arr[loc]=temp;
}
//**PRINT THE ARRAY**
cout<<"\n\n\nTHE SORTED ARRAY IS"<<'\t'<<'\t'<<'\n';
for(s=0;s<n;s++)
cout<<arr[s]<<" ";
char ch;cout<<"\n\n\nPRESS ANY KEY AND ENTER TO EXIT";cin>>ch;
}
//**END OF PROGRAM**

 

bullet /*PROGRAM TO GENERATE THE FIBONACCI SERIES*/

#include<iostream.h>
#include<conio.h>
void main()
{clrscr();
int first,second,third,n;
first=0;
second=1;
cout<<"upto how many elements would you like to generate the fibonacci series";
cin>>n;
cout<<"\nFIBONACCI SERIES\n";
cout<<first<<endl<<second;
for(int i=2;i<n;++i)
{
third=first+second;
cout<<endl<<third<<endl;

first=second;
second=third;
}
}

 

bullet /*PROGRAM TO CHECK WHETHER A GIVEN NUMBER IS PALINDROME OR NOT*/

#include<iostream.h>
#include<conio.h>
void main()
{clrscr();
int n,num,digit,rev=0;
cout<<"input the number\n";
cin>>num;
n=num;
do
{digit=num%10;
rev=rev*10+digit;
num/=10;
}while(num!=0);
cout<<"the reverse of the number is "<<rev<<'\n';
if(n==rev)
cout<<"the number is palindrome\n";
else
cout<<"not palindrome";
}
 

 

bullet /*PROGRAM TO FIND WHETHER GIVEN NUMBER IS ODD OR EVEN OR PRIME*/

#include<iostream.h>
#include<conio.h>
void main()
{clrscr();
char ch;
int num,i;
do {
cout<<"enter the number \n";
cin>>num;
if(num%2==0)
cout<<"even\n";
else
cout<<"odd\n";
if(num==1||num==2)
cout<<"prime\n";
else
{
for(i=3;i<=num/2;++i)
if(num%i==0)
break;
if(i>num/2)
cout<<"prime\n";
}
cout<<"continue(y/n)";
cin>>ch;
}while(ch=='y');
}
 

 

bullet /*PROGRAM TO FIND THE FACTORIAL OF A GIVEN NUMBER*/

#include<iostream.h>
#include<conio.h>
void main()
{clrscr();
int num,fact=1,n;
cout<<"enter the number\n";
cin>>num;
n=num;
while(num)
{fact*=num;
--num;
}
cout<<"the factorial of "<<n<<" is "<<fact;
}
 

 

bullet /*PROGRAM TO CHECK WHTHER A NUMBER IS PERFECT OR NOT*/

#include<iostream.h>
#include<conio.h>
void main()
{clrscr();
int a,b,i,sum=1;
cout<<"enter a number\n";
cin>>a;
for(i=2;i<=a;i++)
{b=a%i;
if(b==0)
{sum+=i;
}
}
if(sum==a)
cout<<"perfect number\n";
else
cout<<" not a perfect no";
}

 

bullet /*PROGRAM TO SHOW THE USE OF FUNCTION OVERLOADING
IN CALCULATION OF AREA OF A TRIANGLE OR RECTANGLE OR SQUARE*/

#include<iostream.h>
#include<conio.h>
#include<math.h>
float area(float a,float b,float c)
{ float s,ar;
s=(a+b+c)/2;
ar=sqrt(s*(s-a)*(s-b)*(s-c));
return ar;
}
float area(float a,float b)
{return a*b;
}
float area(float a)
{return a*a;
}
void main()
{clrscr();
int ch,s1,s2,s3,ar;
do
{
cout<<"\narea main menu\n";
cout<<"1.triangle";
cout<<"\n2.rectangle";
cout<<"\n3.square";
cout<<"\n4.exit";
cout<<"\nenter your choice(1-4)";
cin>>ch;
switch(ch)
{case 1:cout<<"\nenter 3 sides";
cin>>s1>>s2>>s3;
ar=area(s1,s2,s3);
cout<<"\nthe area is"<<ar;
break;
case 2:cout<<"\nenter two sides";
cin>>s1>>s2;
ar=area(s1,s2);
cout<<"\narea="<<ar;
break;
case 3:cout<<"\nenter a side";
cin>>s1;
ar=area(s1);
cout<<"\narea="<<ar;
break;
}
}
while(ch!=4);
}

 

bullet /*PROGRAM TO CONVERT A GIVEN TEMPERATURE SCALE*/

#include<iostream.h>
#include<conio.h>
void main()
{clrscr();
int ch;
float temp,c;
cout<<"\ntemperature conversion menu";
cout<<"\n1.fahrenheit to celsius";
cout<<"\n2.celcius to farenheit";
cout<<"\n3.exit";
cout<<"\nenter your choice";
cin>>ch;
if(ch==1)
{cout<<"\nenter the temp in fahrenheit";
cin>>temp;
c=(temp-32)/1.8;
cout<<c<<"celsius";
}
if(ch==2)
{
cout<<"\nenter in celsius";
cin>>temp;
c=1.8*temp+32;
cout<<c<<"fahrenheit";
}
}
 

 

bullet /*PROGRAM TO INPUT CHARACTERS AND CHANGE THEIR CASE*/

#include<iostream.h>
#include<conio.h>
#include<stdio.h>
void main()
{clrscr();
char ch;
do
{cout<<"\nenter a character ";
ch=getchar();
if(ch=='\n')
ch=getchar();
if(ch>=65&&ch<=90)
ch+=32;
else
if(ch>=97&&ch<=122)
ch-=32;
putchar(ch);
cout<<endl;
cout<<"press 0 to discontinue";
}while(ch!='0');
}

 

bullet //CONVERSION OF OCTAL NUMBER TO BINARY NUMBER//


#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
clrscr();
int d=0,i,o;
cout<<"enter the octal number\n";
cin>>o;
for(i=0;o!=0;o/=10,i++)
{d+=(o%10)*pow(8,i);
}
int b=0;
for(int j=0;d!=0;d/=2,j++)
{b+=(d%2)*pow(10,j);
}
cout<<"the binary no. is"<<b;
}
 

 

bullet /*PROGRAM TO SHOW THE USE OF GRAPHICS IN C++ */

#include<graphics.h>
#include<conio.h>
#include<dos.h>
const int w=75;
class rect
{
int xco,yco;
int linecolor,fillcolor;
public:
rect()
{xco=0;yco=0;linecolor=WHITE;fillcolor=WHITE;}
void set(int x,int y,int lc, int fc)
{xco=x;yco=y;linecolor=lc;fillcolor=fc;}
void draw()
{setcolor(linecolor);
setlinestyle(SOLID_LINE,0,THICK_WIDTH);
rectangle(xco-w,yco-w,xco+w,yco+w);
setfillstyle(SOLID_FILL,fillcolor);
floodfill(xco,yco,linecolor);
line(xco-w,yco-w,xco+w,yco+w);
}
};
void main()
{
int driver,mode;
driver=DETECT;
initgraph(&driver,&mode,"\\tc\\bgi");
rect r1;
rect r2;
rect r3;
r1.set(80,150,YELLOW,RED);
r2.set(250,150,YELLOW,GREEN);
r3.set(420,150,YELLOW,BLUE);
r1.draw();
r2.draw();
r3.draw();
sound(5000);delay(2000);nosound();
getch();
closegraph();
}

 

bullet //*PROGRAM SHOWING THE USE OF STRUCTURES*//

#include<iostream.h>
#include<conio.h>
#include<stdio.h>
//regno structure declared
struct regno
{
int area_code;
int region_code;
int school_code;
short current_year;
int serial_no;
};
//student structure declared
struct student
{
char name[20];
char category;
int marks[5];
regno registration_no;
}arr[2];
void main()
{

char ch;
clrscr();
//input
for(int i=1;i<=2;i++) //i is the counter for inputting
{
cout<<"enter the name"<<endl;
// cin.get(ch);
// cin.getline(arr[i].name,20);
gets(arr[i].name);
cout<<"enter the category"<<endl;
cin>>arr[i].category;
for(int j=1;j<=2;j++)
{
cout<<"enter marks"<<endl;
cin>>arr[i].marks[j];
}
cout<<"enter registration code"<<endl;
cin>>arr[i].registration_no.area_code;
cout<<"enter region code"<<endl;
cin>>arr[i].registration_no.region_code;
cout<<endl;
}
//output
clrscr();
for(int k=1;k<=2;k++) //k is the counter for displaying result
{ cout<<endl<<"name =";
cout.write(arr[k].name,20);
cout<<"category ="<<arr[k].category<<endl;
for(int r=1;r<=2;r++)
{
cout<<"marks ="<<arr[k].marks[r]<<endl;
}
cout<<"area code ="<<arr[k].registration_no.area_code<<endl;
cout<<"region code ="<<arr[k].registration_no.region_code<<endl;
//cin>>ch;
}
}


 
bullet //*DISPLAY ODD NOS. FROM 1 TO 10 IN THE FORM OF A PYRAMID*//

#include<conio.h>
#include<iostream.h>
void main()
{
clrscr ();
int i,j;
for(i=1;i<=9;i+=2)
{
for(j=1;j<=i;j+=2)
{
cout<<j<<'\t';
}
cout<<'\n';
}
}

 

bullet /*PROGRAM TO CONCATENATE TWO STRINGS
TO FIND LENGTH OF A STRING AND
TO REVERSE A STRING*/


#include<iostream.h>
#include<conio.h>
class string
{
char a[20];
public:
void initialise()
{
cout<<"\nenter the string\n "<<endl;
cin.getline(a,20);
}
void display()
{
cout<<endl;
cout.write(a,20);
}
void reverse();
void concatenate();
};
void string::concatenate()
{

int i,j,k;
char b[20],c[20];
for(i=0;i<20;i++)
c[i]=' ';
initialise();
cout<<"enter the second string\n ";
cin.getline(b,20);
for(i=0;a[i]!=0;i++)
c[i]=a[i];
for(k=0;b[k]!=0;k++)
c[i+k]=b[k];
c[i+k]='\0';
cout<<"\nconcatenated string is\n ";
cout.write(c,20);
}

void string::reverse()
{
initialise();
int len,i,j,k;
for(i=0;a[i]!='\0';i++);
cout<<"the length of the string is "<<i;
char b[20];
cout<<"\nthe reversed string is\n";
for(j=0,k=i-1;k>=0;k--,j++)
{ b[j]=a[k];
cout<<b[j];
}
}
void main()
{
clrscr();
string str;
str.concatenate();
str.reverse();
}


 
bullet /*PROGRAM TO SORT CITY NAME AND POPULATION ACCORDING TO PINCODE*/


#include<iostream.h>
#include<conio.h>
//sort city_name
struct city
{
char c_name[20];
int pop;
int pc;
}sp[5];
void main()
{
clrscr();
int t;
char ch,org[5];
for(int i=0;i<3;i++)
{cout<<"\nenter the pincode of the city =";
cin>>sp[i].pc;
org[i]=sp[i].pc;
cout<<"\nenter the name of the city =";
cin.get(ch);
cin.getline(sp[i].c_name,20);
cout<<"\nenter the population =";
cin>>sp[i].pop;
}
//sort the pincode
for(int j=0;j<3;j++)
{for(int k=0;k<2;k++)
{if(sp[k].pc>sp[k+1].pc)
{t=sp[k].pc;
sp[k].pc=sp[k+1].pc;
sp[k+1].pc=t;
}
}
}
//displaying
clrscr();
cout<<"sorted output ";
for(int m=0;m<3;m++)
{cout<<"\npincode ="<<sp[m].pc<<"\t";
for(int n=0;n<3;n++)
{if(sp[m].pc==org[n])
{cout<<"city name ="<<sp[n].c_name<<"\t";
cout<<"population is ="<<sp[n].pop;
}
}
}
}

 

bullet /*PROGRAM SHOWING THE USE OF STATIC FUNCTION WITHIN CLASSES*/

#include<iostream.h>
#include<conio.h>
class x
{ int codeno;
float price;
static int count;
public:
void getval(int i,float j)
{codeno=i;
price=j;
++count;
}
void display(void)
{
cout<<"codeno="<<codeno<<"\t";
cout<<"price= "<<price<<"\n";
}
static void dispcount(void)
{cout<<"count= "<<count;
}
};
int x::count=0;
void main()
{
clrscr();
x o1,o2;
o1.getval(111,25.64);
o2.getval(102,434.87);
x::dispcount;
x o3;
o3.getval(214,65.84);
o1.display();
o2.display();
o3.display();
}
 
bullet /*PROGRAM SHOWING WORKING OF CLASSES TO CALCULATE LARGEST ITEM PRICE
TO DISPLAY LIST OF ITEMS
TO FIND THE SUM OF THE ITEM PRICES*/


#include<iostream.h>
#include<conio.h>
class item
{

int item_code[5];
float it_price[5];
public:
void initialise();
float largest(void);
float sum(void);
float display_items(void);
};
void item::initialise()
{
cout<<"enter the item code and price for 5 items"<<endl;
for(int i=0;i<5;i++)
{
cin>>item_code[i];
cin>>it_price[i];
}
};
float item::largest(void)
{
int i=0;
float large=it_price[i];
for(i=1;i<5;i++)
{
if(large<it_price[i])
large=it_price[i];
}
return large;
}
float item::sum(void)
{
float sum=0;
for(int i=0;i<5;i++)
{sum+=it_price[i];
}
return sum;
}
float item::display_items(void)
{
cout<<"code price"<<endl;
for(int i=0;i<=5;i++)
{cout<<item_code[i];
cout<<endl<<it_price<<endl;
}
return 0;
}
void main()
{
clrscr();
item order;
order.initialise();
float total,biggest;
int ch=0;
do
{ clrscr();
cout<<"main menu"<<endl;
cout<<"1.largest price"<<endl;
cout<<"2.sum"<<endl;
cout<<"3.display item"<<endl;
cout<<"4.exit"<<endl;
cin>>ch;
switch(ch)
{
case 1:biggest=order.largest();
cout<<"the largest is"<<biggest<<endl;
break;
case 2:total=order.sum();
cout<<"the total is"<<total<<endl;
break;
case 3:float display=order.display_items();
cout<<display;
break;
case 4:break;
default: cout<<"wrong choice";
}
}while(ch>=1&&ch<=3);
}


 
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