C++ Program to Converter a Decimal to Octal

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Converter a Number from Decimal to Octal

In the following example, we will convert a Decimal Number (100) to Octal Number (144).

Tips: It is recommended to use our online Decimal to Octal calculator for better understanding.

Example

C++ Compiler
#include <iostream> #include <cmath> using namespace std; int main() { int num = 23456; int arr[50], answer[50]; int value = 1; int i, j = 0; int count = -1; while(num > value) { count++; value = (int) pow(8, count); arr[count] = value; } count = count - 1; for(i=count; i>=0; i--) { answer[j] = num / arr[i]; j++; num = num % arr[i]; } cout << "Octal number of 23456 (decimal) is "; for(i=0; i<=count; i++) cout << answer[i]; return 0; }

Output

Octal number of 23456 (decimal) is 55640

Converter any Given Decimal Number to Octal Number

In the following example, we will convert any given decimal number to an octal number.

Example

C++ Compiler
#include <iostream> #include <cmath> using namespace std; int main() { int num, copyNum, arr[50], answer[50]; int value = 1; int i, j = 0; int count = -1; cout << "Enter a Decimal Number: "; cin >> num; copyNum = num; while(copyNum > value) { count++; value = (int) pow(8, count); arr[count] = value; } count = count - 1; for(i=count; i>=0; i--) { answer[j] = copyNum / arr[i]; j++; copyNum = copyNum % arr[i]; } cout << "Octal number of " << num << " (decimal) is "; for(i=0; i<=count; i++) cout << answer[i]; return 0; }

Output

Enter a Decimal Number: 10 Octal number of 10 (decimal) is 12

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