Implementation of the double dabble algorithm to convert binary to BCD.

doubleDabble.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char *binary(unsigned int dec);


int main(int argc, char * argv [] ){

	unsigned int input = strtol(argv[1],NULL,10); 
	unsigned int temp = 0x0;

	printf("%s",binary(temp));
	printf(" %s = %u \n",binary(input),input);

	for(int i = 0; i<12;i++){
		temp=temp <<1;
		input & 0x800 ? temp = temp^0x1: '0';
		input=input <<1;
		printf("%s",binary(temp));
		printf(" %s ",binary(input));

		if(((temp & 0xF) >= 0x4)){ // checks if the ones place > 4
			printf("ONES – Adding 0x3");
			temp = temp+0x3;
		}

		if(((temp & 0xF0) >= 0x40)){ // checks if the tens place > 4
			printf("TENS – Adding 0x3");
			temp = temp+0x30;
		}

		if(((temp & 0xF00) >= 0x400)){ // checks if the hundreds place > 4
			printf("TENS – Adding 0x3");
			temp = temp+0x300;
		}
		printf("\n");
	}
}

char *binary(unsigned int dec){
	static char bin[13];
	for(int i = 0; i<12;i++){
		bin[i] = dec & 0x800 ? '1' : '0';
		dec = dec << 1;
	}
	bin[12]='\0';
	return (bin);
}