C Program to Convert Decimal number into Hexadecimal | Decimal to Hexadecimal Conversion in C

C Program to Convert Decimal number into Hexadecimal | Decimal to Hexadecimal Conversion in C | C Language assignment to convert Decimal Number to Hexadecimal 

#include
#include
#include

void dec_hex(long int num)   // UDF
{
long int rem[50],i=0,length=0;

while(num>0)
   {
      rem[i]=num%16;
      num=num/16;
      i++;
      length++;
   }

printf("\n Hexadecimal number : ");
for(i=length-1;i>=0;i--)
  {
    switch(rem[i])
    {
      case 10:
          printf("A");
          break;
      case 11:
          printf("B");
          break;
      case 12:
          printf("C");
          break;
      case 13:
          printf("D");
          break;
      case 14:
          printf("E");
          break;
      case 15:
          printf("F");
          break;
      default :
         printf("%ld",rem[i]);
    }
  }
}
//================================================
void main()
{
long int num;
clrscr();

 printf("Enter the decimal number : ");
 scanf("%ld",&num);

    dec_hex(num);   // Calling function

 getch();
}