Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Program for octal to decimal conversion in C++
Given with an octal number as an input, the task is to convert the given octal number into a decimal number.
Decimal numbers in computer is represented with base 10 and octal number is represented with base 8 starting from the digit 0 till 7 whereas decimal numbers can be any numeric digit starting from 0 – 9.
To convert an octal number into a decimal number follow these steps −
- We will extract digits starting from right to left through a remainder and then multiply it with the power starting from 0 and will be increased by 1 till the (number of digits) – 1
- Since we need to do conversions from octal to binary the base of power will be 8 as octal have base 8.
- Multiply the digits of given inputs with base and power and store the results
- Add all the multiplied values to obtain the final result which will be a decimal number.
Given below is the pictorial representation of converting an octal number into a decimal number.
Example
Input-: 451 1 will be converted to a decimal number by -: 1 X 8^0 = 1 5 will be converted to a decimal number by -: 5 X 8^1 = 40 4 will be converted to a decimal number by -: 4 X 8^2 = 256 Output-: total = 0 + 40 + 256 = 10
Algorithm
Start Step 1-> declare function to convert octal to decimal int convert(int num) set int temp = num set int val = 0 set int base = 1 Set int count = temp Loop While (count) Set int digit = count % 10 Set count = count / 10 Set val += digit * base Set base = base * 8 End return val step 2-> In main() set int num = 45 Call convert(num) Stop
Example
#include <iostream>
using namespace std;
//convert octal to decimal
int convert(int num) {
int temp = num;
int val = 0;
int base = 1;
int count = temp;
while (count) {
int digit = count % 10;
count = count / 10;
val += digit * base;
base = base * 8;
}
return val;
}
int main() {
int num = 45;
cout <<"after conversion value is "<<convert(num);
}Output
IF WE RUN THE ABOVE CODE IT WILL GENERATE FOLLOWING OUTPUT
after conversion value is 37
Updated on: 18-Oct-2019
116 Views
Advertisements