C program to convert decimal to binary number

In this article we will learn to implement a C program to convert decimal to binary number. A C program is provided below to read a decimal number and print its equivalent binary number.

Program is as follows:

//C program to display the binary equivalent of a given decimal number
#include<stdio.h>
#include<conio.h>
void main()
{
	int num,length,i;
	int a[10];
	printf("Enter a +ve integer: ");
	scanf("%d",&num);
	length=0;
	i=0;
	while(num>0)
	{
		a[i]=num%2;
		num/=2;
		length++;
		i++;
	}
	printf("Binary equivalent is: ");
	for(i=length-1;i>=0;i--)
		printf("%d ",a[i]);
	getch();
}

Input and output for the above program is as follows:

Enter a +ve integer: 25
Binary equivalent is: 1 1 0 0 1

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.