Reverse a number

[sonia.sardana]

Que- If a five digit number is input through the keyboard, write a program to reverse the number.

void main()
{
   int num=12345, res=0, rem;
   clrscr();
   while(num > 0)
   {
      rem=num% 10;
      res=res* 10 + rem;
      num=num/10;
   }
   printf("Reverse of a number=%d",res);
   getch();
}

According to me logic is rite, but the result coming out to be is not correct... Check it our,,, & reply

[Sick0Fant]

Que- If a five digit number is input through the keyboard, write a program to reverse the number.

void main()
{
int num=12345, res=0, rem;
clrscr();
while(num > 0)
{
rem=num% 10;
res=res* 10 + rem;
num=num/10;
}
printf("Reverse of a number=%d",res);
getch();
}

According to me logic is rite, but the result coming out to be is not correct... Check it our,,, & reply

It should (and does) work.

[sonia.sardana]

If we enter the number upto four digit,answer is rite, Suppose I enter 1234 Answer is 4321.
But If we enter five digit numb,suppose 12345, Answer is not coming 54321.
If we declare num as long, even then the o/p is not coming out to be correct for 5 digit number.

[Sick0Fant]

Far be it from me to doubt you, but I copied and pasted your code into an editor and compiled it, and it produced the desired output.

[sonia.sardana]

Ok thx, but i face still d same probs.

[Ganon11]

Exactly what output are you getting?

e.g. You enter 12345.

What is output?

[sonia.sardana]

When I enter 12345, answer is -11215.
When I enter the numb upto 4 digit, answer is coming correct.

[JosAH]

When I enter 12345, answer is -11215.
When I enter the numb upto 4 digit, answer is coming correct.

The ints on your system are two bytes wide so they can only store numbers in
the range [-2^15,2^15-1], e.g. the number 54321 - 2^15 == -11215, so your
algorithm is correct, the ints are just to narrow (try four byte longs).

kind regards,

Jos

[sonia.sardana]

then wat to do to get the correct answer of Five digit number,,,,,,,Even if I declare the numb as long datatype.........even then the answer is not coming out to be correct

[JosAH]

then wat to do to get the correct answer of Five digit number,,,,,,,Even if I declare the numb as long datatype.........even then the answer is not coming out to be correct

Make all your variable long ints and print them as such: %ld instead of %d.

kind regards,

Jos

[vicky08]

Dear Sonia.;
ur code is absolutely correct. firstly check ur compiler size n gv 3/4 digit num.
as it is working in my sys. i.e visual studio..
ck it out n info.

Regards
Vicky...