Decimal to Binary program in C language

The decimal (base ten) numeral system has ten possible values (0,1,2,3,4,5,6,7,8, or 9) for each place-value. In contrast, the binary (base two) numeral system has two possible values, often represented as 0 or 1, for each place-value. In this program if you enter 15 as input(decimal no) then output is 1111 as in binary. Following is a source code of decimal to binary program in c language.  

 #include<stdio.h>  
 #include<conio.h>  
 void main()  
 {  
   int dec, i=0, j;  
   int binary[50];  
   clrscr();  
   printf("Enter Decimal No : ");  
   scanf("%d",&dec);  
   while( dec > 0 )  
   {  
       binary[i] = dec % 2;  
       i++;  
       dec = dec / 2;  
   }  
   for(j = i-1; j >= 0; j--)  
   {  
     printf("%d", binary[j]);  
   }  
   getch();  
 }