C Programming Code Examples
C > Conversions Code Examples
C Program to Convert Binary to Octal Number System
/* C Program to Convert Binary to Octal Number System
In this program, user is asked to enter the binary number and the program then converts that binary number to the octal number by calling a user defined function. To understand this program, you should be familiar with the following C programming concepts: */
#include <stdio.h>
#include <math.h>
//This function converts binary number to octal number
int binaryToOctal(long binarynumber)
{
int octalnumber = 0, decimalnumber = 0, i = 0;
/* This while loop converts binary number "binarynumber" to the
* decimal number "decimalnumber"
*/
while(binarynumber != 0)
{
decimalnumber = decimalnumber + (binarynumber%10) * pow(2,i);
i++;
binarynumber = binarynumber / 10;
}
//i is re-initialized
i = 1;
/* This loop converts the decimal number "decimalnumber" to the octal
* number "octalnumber"
*/
while (decimalnumber != 0)
{
octalnumber = octalnumber + (decimalnumber % 8) * i;
decimalnumber = decimalnumber / 8;
i = i * 10;
}
//Returning the octal number that we got from binary number
return octalnumber;
}
int main()
{
long binarynumber;
printf("Enter a binary number: ");
scanf("%ld", &binarynumber);
// calling the function here
printf("Equivalent octal value: %d", binaryToOctal(binarynumber));
return 0;
}
Writes the C string pointed by format to the standard output (stdout). If format includes format specifiers (subsequences beginning with %), the additional arguments following format are formatted and inserted in the resulting string replacing their respective specifiers. printf format string refers to a control parameter used by a class of functions in the input/output libraries of C programming language. The string is written in a simple template language: characters are usually copied literally into the function's output, but format specifiers, which start with a % character, indicate the location and method to translate a piece of data (such as a number) to characters. "printf" is the name of one of the main C output functions, and stands for "print formatted". printf format strings are complementary to scanf format strings, which provide formatted input (parsing). In both cases these provide simple functionality and fixed format compared to more sophisticated and flexible template engines or parsers,
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