#### Write a program in C++ to print a massage on output screen.

``````#include<iostream>
using namespace std;
int main()
{
cout<<"Hello world";
return 0;
}
``````

Output:

``````Hello world
``````

#### Write a program in C++ to print an integer value.

``````#include<iostream>
using namespace std;
int main()
{
int a;
cout<<"Enter integer\n";
cin>>a;
cout<<"Integer is "<<a;
return 0;
}
``````

Output:

``````Enter integer
10
Integer is 10
``````

#### Write a program in C++ to addition of two number.

``````#include<iostream>
using namespace std;
int main()
{
int a,b,sum;
cout<<"Enter the 1st number\n";
cin>>a;
cout<<"Enter the 2nd number\n";
cin>>b;
sum=a+b;
cout<<"Sum of two number "<<sum;
return 0;
}
``````

Output:

``````Enter the 1st number
10
Enter the 2nd number
20
Sum of two number 30
``````

#### Write a program in C++ to subtraction of two number.

``````#include<iostream>
using namespace std;
int main()
{
int a,b,sub;
cout<<"Enter the 1st number\n";
cin>>a;
cout<<"Enter the 2nd number\n";
cin>>b;
sub=a-b;
cout<<"Subtraction of two number "<<sub;
return 0;
}
``````

Output:

``````Enter the 1st number
10
Enter the 2nd number
20
Subtraction of two number -10
``````

#### Write a program in C++ to multiplication of two number.

``````#include<iostream>
using namespace std;
int main()
{
int a,b,mul;
cout<<"Enter the 1st number\n";
cin>>a;
cout<<"Enter the 2nd number\n";
cin>>b;
mul=a*b;
cout<<"Multiplication of two number "<<mul;
return 0;
}
``````

Output:

``````Enter the 1st number
10
Enter the 2nd number
20
Multiplication of two number 200
``````

#### Write a program in C++ to Division of two number.

``````#include<iostream>
using namespace std;
int main()
{
int a,b,div;
cout<<"Enter the 1st number\n";
cin>>a;
cout<<"Enter the 2nd number\n";
cin>>b;
div=a/b;
cout<<"Division of two number "<<div;
return 0;
}
``````

Output:

``````Enter the 1st number
20
Enter the 2nd number
10
Sum of two number 2
``````

#### Write a program in C++ to swap two number with the help of third variable.

``````#include<iostream>
using namespace std;
int main()
{
int a,b,c;
cout<<"Enter the first number\t";
cin>>a;
cout<<"\nEnter the second number\t";
cin>>b;
c=a;
a=b;
b=c;
cout<<"First number is\t"<<a;
cout<<"\nSecond number is\t<<b;
return 0;
}
``````

Output:

``````Enter the first number    12
Enter the second number    13
First number is    13
Second number is    12
``````

#### Write a program in C++ to swap two number without the help of third variable.

``````#include<iostream>
using namespace std;
int main()
{
int a,b;
cout<<"Enter the first number\t";
cin>>a;
cout<<"\nEnter the second number\t";
cin>>b;
a=a+b;
b=a-b;
a=a-b;
cout<<"First number is\t"<<a;
cout<<"\nSecond number is\t<<b;
return 0;
}
``````

Output:

``````Enter the first number    12
Enter the second number    13
First number is    13
Second number is    12
``````

#### Write a program in C++ to find the greatest number in two numbers with the help of if/else.

``````#include<iostream>
using namespace std;
int main()
{
int a,b;
cout<<"Enter the first number\t";
cin>>a;
cout<<"Enter the second number\t";
cin>>b;
if(a>b)
cout<<"Greatest number is\t"<<a;
else
cout<<"Greatest number is\t"<<b;
return 0;
}
``````

Output:

``````Enter the first number    12
Enter the second number    13
Greatest number is    13
``````

## Discussion

Read Community Guidelines

## Awesome Bitwise Operations and Tricks with Examples

You've successfully subscribed to Developer Insider
Great! Next, complete checkout for full access to Developer Insider
Welcome back! You've successfully signed in
Success! Your account is fully activated, you now have access to all content.