Convert Octal to Decimal
Convert Octal to Decimal in C++ (6 Programs)
IntermediateTopic: Advanced Number Programs
C++ Convert Octal to Decimal Program
This program helps you to learn the fundamental structure and syntax of C++ programming.
#include <iostream>
#include <cmath>
using namespace std;
int main() {
long long octal;
int decimal = 0, i = 0, remainder;
cout << "Enter an octal number: ";
cin >> octal;
long long temp = octal;
while (temp != 0) {
remainder = temp % 10;
temp /= 10;
decimal += remainder * pow(8, i);
++i;
}
cout << "Octal: " << octal << " = Decimal: " << decimal << endl;
return 0;
}Output
Enter an octal number: 12 Octal: 12 = Decimal: 10
Understanding Convert Octal to Decimal
This program converts octal to decimal by multiplying each digit by 8 raised to its position. It demonstrates 6 different methods: using pow(), using string, using recursion, using stoi() with base 8, using manual calculation, and using functions.
Note: To write and run C++ programs, you need to set up the local environment on your computer. Refer to the complete article Setting up C++ Development Environment. If you do not want to set up the local environment on your computer, you can also use online IDE to write and run your C++ programs.