Large numbers

[kostasxx]

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

[William Hemsworth]

Trying using the long long or __int64 integer type.

[kostasxx]

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

[William Hemsworth]

#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.

[kostasxx]

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?

[wildgoose]

What compiler are you using?

[William Hemsworth]

What compiler are you using?

How could you not guess from post #5?

[darkphotn]

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[] .

[William Hemsworth]

>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.

[wildgoose]

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.

[William Hemsworth]

One thing you could try:

long long num = 123456789123[B]ll[/B];

Just a guess though.

[Tom Gunn]

One thing you could try:

long long num = 123456789123[B]ll[/B];

Just a guess though.

ll looks too much like 11. LL is easier to see as a literal suffix.

[tux4life]

And in case of positive numbers only then consider making it unsigned as well :)
And IMO using LL it's easier to recognize it as a literal (as already mentioned) (there's no doubt possible then) ...

[Dave Sinkula]

In C99 mode, with gcc 3.4.5:

#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>

int main()
{
   int64_t value = 930342900243;
   printf("value = %" PRId64 "\n", value);
   return 0;
}

/* my output
value = 930342900243
*/