Decimal to Binary, Octal and HEX converter

#include
#include
#define MAX 79
#define ESC 27
void main()
{
char res,r;
int i,k=0,y;
long j=0,l=0,o=0;
textcolor(15);
for(i=0;i<5000;i++)
cprintf(" ");
while(1)
{
clrscr();
printf("Enter Any Number To Be Converted : ");
scanf("%ld",&j);
l=j;
o=l;
k=0;
if(j>2145555550)
{
textcolor(4);
gotoxy(15,5);
cprintf("The Number Is Greater Than Range");
textcolor(15);
getch();
goto end;
}
else
{
gotoxy(1,6);
printf("Binary Equivalent:-");
y=MAX;
while(j>0)
{
k=j%2;
j=j/2;
gotoxy(y,6);
y--;
printf("%d",k);
}
gotoxy(1,8);
printf("Hexadecimal Equivalent:- ");
y=MAX;
while(l>0)
{
k=l%16;
l=l/16;
gotoxy(y,8);
y--;
if(k<=9)
{
printf("%d",k);
}
if(k==10)
{
printf("A");
}
if(k==11)
{
printf("B");
}
if(k==12)
{
printf("C");
}
if(k==13)
{
printf("D");
}
if(k==14)
{
printf("E");
}
if(k==15)
{
printf("F");
}
}
gotoxy(1,10);
printf("Octal Equivalent:- ");
y=MAX;
while(o>0)
{
k=o%8;
o=o/8;
gotoxy(y,10);
y--;
printf("%d",k);
}
}
gotoxy(15,25);
printf("Press Any Key To Continue , ESC To Exit");
res=getch();
if(res==ESC)
{
break;
}
}
end:
textcolor(7);
for(i=0;i<5000;i++)
cprintf(" ");
clrscr();
}

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