C Program to convert decimal to binary

C Program to convert decimal to binary

Input: 5

Output: 000000000000101

Method 1:

#include <stdio.h> #include <stdlib.h> int main(void) { int n; int i; /* get the number to find its binary */ scanf("%d",&n); /* 100000000000000 will bitwise and with 000000000000101 , so we get 1's when 101 left shifted */ for(i=1;i<=15;i++) printf("%d",1<<15 & n<<i ? 1 : 0); return 0; }

Method 2:

#include <stdio.h> /* recursive function */ void binary(int n) { /* conditional recursive call Call recursively until n becomes 1 or lesser than 1 */ if(n>1) binary(n/2); /* until then print the reverse of the recursive data processed */ printf("%d",n%2); } int main(void) { int n; /* get the input number to print its binary */ scanf("%d",&n); /* call the recursive function binary to print binary of n */ binary(n); return 0; }

Method 2.1:
(Print the binary in reverse)

#include <stdio.h> int main(void) { int n; /* get the input number from the user*/ scanf("%d",&n); /* print the binary result & divide n by 2 every time, till n is a true value */ for(;n;printf("%d",n%2),n/=2); return 0; }

Method 2.2:

#include <stdio.h> /* recursive function to convert number to binary */ void tobinary(int n) { /* condition to break the recursive loop */ if(n==0) return; /* call the tobinary function recursively */ tobinary(n/2); /* print the binary representation of the number entered by the user */ printf("%d",n%2); } int main(void) { int n; /* get the number from the user */ scanf("%d",&n); /* call the recursive function to print the binary of number n */ tobinary(n); return 0; }