Programming
Aptitude
Syllabus
Interview Preparation
Interview Exp.
Off Campus
0
Notifications Mark All Read
- Login
- Get Prime
0
Program for Octal to Decimal Number
Octal to Decimal Number
We will write a C program to display the conversion of octal number to decimal number and the number will be entered by the user. This will help to understand the basic structure of programming. In this program , we will display the coversion of octal number to decimal number easily by using proper syntax and algorithms.
Working of Program :
In the program, we will require some numbers from the user to display the conversion of octal number to decimal number.
Important Note :
- If the number is expressed by base 8 numeral system then that number is octal number.
- If the number is expressed by base 10 numeral system then that number is decimal number.
Syntax for while() loop:
while(condition)
{
// Statements
// Increment / Decrement
}
Problem 1
Write a program to convert the octal number into decimal number using while loop.
- Firstly, we have to enter the number.
- Then print the number.
Code
#include<stdio.h>
#include<math.h>
int convertDecimalToOctal (int decimalNumber);
int main ()
{
int decimalNumber;
printf ("Enter a decimal number = ");
scanf ("%d", &decimalNumber);
printf ("%d in decimal number = %d in octal number", decimalNumber,
convertDecimalToOctal (decimalNumber));
return 0;
}
int convertDecimalToOctal (int decimalNumber)
{
int octalNumber = 0, i = 1;
while (decimalNumber != 0)
{
octalNumber += (decimalNumber % 8) * i;
decimalNumber /= 8;
i *= 10;
}
return octalNumber;
}
Output
Enter a decimal number = 67 67 in decimal number = 103 in octal number
Problem 2
Write a program to convert the octal number into decimal number using function.
- Firstly, we have to enter the number.
- Then print the number.
Code
#include<stdio.h>
#include<math.h>
long long convertOctalToDecimal (int octalNumber);
int main ()
{
int octalNumber;
printf ("Enter an octal number = ");
scanf ("%d", &octalNumber);
printf ("%d in octal number = %lld in decimal number", octalNumber,
convertOctalToDecimal (octalNumber));
return 0;
}
long long convertOctalToDecimal (int octalNumber)
{
int decimalNumber = 0, i = 0;
while (octalNumber != 0)
{
decimalNumber += (octalNumber % 10) * pow (8, i);
++i;
octalNumber /= 10;
}
i = 1;
return decimalNumber;
}
Output
Enter an octal number = 89 89 in octal number = 73 in decimal number
Prime Course Trailer
Related Banners
Get PrepInsta Prime & get Access to all 200+ courses offered by PrepInsta in One Subscription
Get over 200+ course One Subscription
Courses like AI/ML, Cloud Computing, Ethical Hacking, C, C++, Java, Python, DSA (All Languages), Competitive Coding (All Languages), TCS, Infosys, Wipro, Amazon, DBMS, SQL and others