Here is a C program to convert binary number to decimal number system.
Required Knowledge
This program converts a binary number( base 2) to decimal number (base 10).
Binary number system is a base 2 number system using digits 0 and 1 whereas Decimal number system is base 10 and using digits from 0 to 9. Given a binary number as input from user convert it to decimal number.
For Example:
00000111 in Binary is equivalent to 7 in Decimal number system.
Algorithm to convert Binary to Decimal number
- We multiply each binary digit with 2i and add them, where i is the position of the binary digit(starting from 0) from right side. Least significant digit is at position 0.
Let's convert 0101 binary number to decimal number
Decimal number = 0*23 + 1*22 + 0*21 + 1*20 = 0 + 4 + 0 + 1 = 5
C program to convert a decimal number to octal number
#include <stdio.h>
#include <math.h>
int main() {
long binaryNumber, decimalNumber=0;
int position=0, digit;
printf("Enter a Binary Number\n");
scanf("%ld", &binaryNumber);
while(binaryNumber!=0) {
/* get the least significant digit of binary number */
digit = binaryNumber%10;
decimalNumber += digit*pow(2, position);
position++;
binaryNumber /= 10;
}
printf("Decimal Number : %ld", decimalNumber);
return 0;
}
Output
Enter a Binary Number 00000111 Decimal Number : 7
Enter a Binary Number 00010000 Decimal Number : 16
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