decimal to binary conversion in c

Problem Statement

In this program we will code a basic program to convert a decimal number to a binary number. Decimal numbers ranges from 0 to 9, like 342, 456,23456 are all decimal numbers. Binary numbers are the numbers that are represented by 0’s and 1’s. Like 2 in binary form is equivalent to ‘0010’.

#include 

void dectobin(int num)

{ 

int temp, i;

temp=num;

int a[10];

for(i=0;num>0;i++)   

{   

a[i]=num%2;   

num=num/2;   

}   

printf("\nBinary form of %d : ",temp);   

for(i=i-1;i>=0;i--)   

{   

printf("%d",a[i]);   

}   

}

int main()

{

int n;

printf("Enter the number : ");

scanf("%d", &n);

dectobin(n);

return 0;

}

Output

Enter the number : 10

Binary form of 10 : 1010

Explanation 

In this problem we have to convert a decimal number to the binary number. In the above code a[i]=num%2; // finding and storing the remainder at i-th index of an array.
num=num/2; // dividing the number by 2

We will repeat above process till our number is greater than 0.