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c program for inter conversion of decimal, binary, octal, hexadecimal

#include"stdio.h"
#include"conio.h"
void main()
{
int n,n1,n2,rem,no,bin[15],oct[15],i=0,j,k=0,l=0;char hex[15];
clrscr();
printf("Enter the number=");
scanf("%d",&n);
no=n1=n2=n;
while(n>0)
{
bin[i++]=n%2;
n=n/2;

}
printf("\n\nBinary equivalent of %d is=",no);
for(j=i-1;j>=0;j--)
{
printf("%d",bin[j]);
}
while(n1>0)
{
oct[k++]=n1%8;
n1=n1/8;

}
printf("\n\nOctal equivalent of %d is=",no);
for(j=k-1;j>=0;j--)
{
printf("%d",oct[j]);
}
while(n2>0)
{
rem=n2%16;
if(rem>=10)
{
switch(rem)
{
case 10:hex[l++]=65;
n2=n2/16;
break;
case 11:hex[l++]=66;
n2=n2/16;
break;
case 12:hex[l++]=67;
n2=n2/16;
break;
case 13:hex[l++]=68;
n2=n2/16;
break;
case 14:hex[l++]=69;
n2=n2/16;
break;
case 15:hex[l++]=70;
n2=n2/16;
break;
}
}
else
{
rem=rem+48;
hex[l++]=rem;
n2=n2/16;
}
}