The document contains 10 C++ programs that demonstrate various programming concepts like arithmetic operators, if-else statements, loops, arrays, etc. Each program is presented with its source code and expected output.

1. 1
// 1. Program to implement arithmetic operators
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a,b,sum,sub,mul,div;
cout<<"nenter the numbers : ";
cin>>a>>b;
sum=a+b;
sub=a-b;
mul=a*b;
div=a/b;
cout<<"nSum:"<<sum;
cout<<"nSubtraction:"<<sub;
cout<<"nMultipication:"<<mul;
cout<<"nDivision:"<<div;
getch();
}

2. 2
Output :

3. 3
// 2. Program to calculate simple interest
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int principle,rate,time,si;
cout<<"nEnter the principle : ";
cin>>principle;
cout<<"nEnter the rate : ";
cin>>rate;
cout<<"nEnter the time :";
cout<<interest;
si=(principle*rate*time)/100;
cout<<"nSimple Interest :"<<si;
getch();
}

4. 4
Output :

5. // 3. Program to implement increment and decrement operators
5
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int x=5,y=5;
cout<<x++;
cout<<"n";
cout<<++x;
cout<<"n";
cout<<y++;
cout<<"n";
cout<<++y;
getch();
}

6. 6
Output :

7. 7
// 4. Program to implement if-else statements
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int year;
cout<<"nEnter the year:";
cin>>year;
if(year%4==0)
cout<<"nIt is a leap year";
else
cout<<"Not a leap year";
getch();
}

8. 8
Output :

9. // 5. Program to implement if-else if ladder statement
9
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
float sal;
float tax;
cout<<"nEnter the salary : ";
cin>>sal;
if(sal>=9000)
tax=sal*0.4;
else if((sal>=7500)&&(sal<8999))
tax=sal*0.3;
else
tax=sal*0.2;
cout<<"Tax:"<<tax;
getch();
}

10. 10
Output :

11. // 6. Program to implement switch case statement
11
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int ch;
cout<<"nEnter your choice : ";
cin>>ch;
switch(ch)
{
case 1 : cout<<"nCase 1 : Good Morning";
break;
case 2 : cout<<"nCase 2 : Good Afternoon";
break;
case 3 : cout<<"nCase 3 : Good Evening";
break;
case 4 : cout<<"nCase 4 : Good Night";
break;
deafult: cout<<"nWrong choice";
}
getch();
}

12. 12
Output :

13. // 7. Program to implement while loop and it computes a power of b
13
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
float a;
int b;
float pow;
cout<<"nEnter the values : ";
cin>>a>>b;
pow=1.0;
while(b>=1)
{
pow=pow*a;
b--;
}
cout<<"Power : "<<pow;
getch();
}

14. 14
Output :

15. // 8. Program to implement do while and it computes the factorial of a number
15
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int num,fact=1;
cout<<"nEnter the numnber : ";
cin>>num;
do
{
fact=fact*num;
num--;
}
while(num!=0);
cout<<"nFactorial :"<<fact;
getch();
}

16. 16
Output :

17. 17
// 9. Program to display an array
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a[5],i;
cout<<"nEnter the elements in an array :n";
for(i=0;i<5;i++)
{
cin>>a[i];
}
cout<<"nDisplayed array : n";
for(i=0;i<5;i++)
{
cout<<"n"<<a[i];
}
getch();
}

18. 18
Output :

19. // 10. Program to display multiples of a number using for loop
19
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int i,num;
cout<<"nEnter the number :";
cin>>num;
cout<<"The multiples are :";
for(i=1;i<=10;i++)
{
cout<<"n"<<num*i;
}
getch();
}

20. 20
Output :