**The Program in C++ to Convert Binary number to octal number** **is given below:**

```
#include <iostream>
#include <string>
using namespace std;
string binaryToOctal(string binary) {
string octal = "";
for (int i = 0; i < binary.length(); i += 3) {
string temp = binary.substr(i, 3);
int decimal = stoi(temp, 0, 2);
octal += (char)(decimal + '0');
}
return octal;
}
int main() {
string binary;
cout<< "Hello Codeauri Family, Enter a binary number to convert them into octal equivalent:\n";
cin >>binary;
cout << "Well,the octal equivalent is: " << binaryToOctal(binary) << endl;
return 0;
}
```

## Output:

Hello Codeauri Family, Enter a binary number to convert them into octal equivalent:

1010

Well,the octal equivalent is: 50

## Pro-Tips**💡**

This program prompts the user to enter a binary number, then uses a function called “binaryToOctal” to convert the number to octal.

The octal equivalent is then output to the console. The binaryToOctal function does the following:

- It groups the binary number in groups of 3 digits starting from the right
- It converts each group of 3 digits to decimal
- It converts each decimal number to its corresponding ASCII character (0-7)
- Finally it returns the final octal string. Note that this implementation assumes that the binary number is a multiple of 3, if not the last group of digits will be padded with zeroes.

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