Introduction

Control Statement

- Program to identify day of week
- Program to print Fibonacci series
- Check Whether the Number is Even or Odd in C++
- Program to check whether the number is prime or not
- Program to check vowel or constant
- Program to check the largest number among three numbers
- Program to the sum of natural numbers
- Program to check leap year
- Program to find factorial of the number

Function

- Program to find LCM
- Program to check prime number using Functions
- Program to convert Binary to Decimal Number
- Program to convert Decimal to Binary Number
- Program to convert Binary to Octal Number
- Program to convert Octal to Binary Number
- Program to find reverse of the sentence using Recursion
- Program to Shutdown and restart Computer
- Program to find the area of triangle

Array

Pointer

OOPS

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# Program to convert Binary to Octal Number

In this example, We will learn how to convert binary number to octal number.

To understand this example, You must have knowledge in following topics

```
#include <iostream>
#include <cmath>
using namespace std;
int convertBinarytoOctal(long long);
int main()
{
long long binaryNumber;
cout << "Enter a binary number: ";
cin >> binaryNumber;
cout << binaryNumber << " in binary = " << convertBinarytoOctal(binaryNumber) << " in octal ";
return 0;
}
int convertBinarytoOctal(long long binaryNumber)
{
int octalNumber = 0, decimalNumber = 0, i = 0;
while(binaryNumber != 0)
{
decimalNumber += (binaryNumber%10) * pow(2,i);
++i;
binaryNumber/=10;
}
i = 1;
while (decimalNumber != 0)
{
octalNumber += (decimalNumber % 8) * i;
decimalNumber /= 8;
i *= 10;
}
return octalNumber;
}
```

The output of above program is

```
Enter a binary number: 110
110 in binary = 6 in octal
```

In the above example, We have created one function `convertBinarytoOctal()` which converts the binary number to the octal number.

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