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Large numbers

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Join Date: May 2009

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kostasxx

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Large numbers

Jun 18th, 2009

Hi

I use Dev - C++

and i d like to ask you cause i dont seem to figure that out, how can i store a 12 digit number?

For example lets say this is the number 930342900243

How can i write a program that would print that number using a variable?

Thanks

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William Hemsworth William Hemsworth is offline

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Re: Large numbers

Jun 18th, 2009

Trying using the long long or __int64 integer type.

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kostasxx

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Re: Large numbers

Jun 18th, 2009

so you mean use long long or __int64 like for example

long long variable; or __int 64 variable;

variable = value;

display variable?

if yes that didnt work for me in both cases.

If im wrong can you please send some code so that i can understand better what you mean?

thanks

Last edited by kostasxx; Jun 18th, 2009 at 12:49 pm.

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Re: Large numbers

Jun 18th, 2009

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
#include <stdio.h>
 
int main( void ) {
  // how can i store a 12 digit number?
  long long num = 123456789123;
 
  // print that number using a variable
  printf( "%lld", num );
 
  return 0;
}
#include <stdio.h>

int main( void ) {
  // how can i store a 12 digit number?
  long long num = 123456789123;

  // print that number using a variable
  printf( "%lld", num );

  return 0;
}

I think that's right, hope this helps.

Last edited by William Hemsworth; Jun 18th, 2009 at 1:24 pm.

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Re: Large numbers

Jun 18th, 2009

i used your code but again:

[Warning] integer constant is too large for "long" type

i think i should stop using dev, maybe its dev's problem? Should i use another compiler?

any recommendation?

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Re: Large numbers

Jun 18th, 2009

What compiler are you using?

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Re: Large numbers

Jun 18th, 2009

•

Originally Posted by wildgoose

What compiler are you using?

How could you not guess from post #5?

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Re: Large numbers

Jun 18th, 2009

long long blahblahquack = 930342;

blahblahquack *= 1000000;

blahblahquack += 900243;

do_something(blahblahquack);

-----

or you could make a function:

long long from_thousands(int a, int b, int c, int d, int e){
long long ans = 0;
ans += a; ans *= 1000;
ans += b; ans *= 1000;
ans += c; ans *= 1000;
ans += d; ans *= 1000;
ans += e;
}

long long blahblahquack = from_thousands(0,930,342,900,243);

If you want to code it in C#, the code is cleaner -- use an object[] .

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Re: Large numbers

Jun 18th, 2009

>If you want to code it in C#, the code is cleaner -- use an object[]
Don't bother suggesting another language, we're in the C forum and we can assume the OP wants to use C, unless he says so himself that he's undecided.

Either way, that post didn't solve his problem. I don't use Dev, but your best bet would be to search the problem on google.

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Re: Large numbers

#10

Jun 18th, 2009

There are many Dev IDE's but the typical Dev refers to Visual Studio 6.0 not newer! That version did not support long long. And math with 64-bit data had to be done in assembly language!

It also had trouble with long int. And it equated long the same as int thus both 32-bit.