bkict 1

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <conio.h>

long int binary(int a); //chuyen decimal sang binary
int main(){
    int x; long int bi;
    printf("Convert Decimal to Binary program\n");
	while (1)
	{
		printf("      Enter a positive integer number: ");
		fflush(stdin);
		scanf("%d",&x);
		bi = binary(x);
		printf("      Binary number: : %ld\n",bi);
		printf("Press any key to do another conversion.\n\n");
		getch();
	}
	return(0);
}

long int binary(int a){
	long int bi=0,x=1; int b;
	while (a>0){
		b= a%2;
		bi+= b*x;
		x*= 10;
		a/=2;
	}
	return(bi);
}