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From: Martin Ambuhl <mambuhl AT earthlink DOT net>
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: long long
References: <140 DOT 3ef15c87 DOT 2f500941 AT aol DOT com>
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Date: Fri, 25 Feb 2005 17:05:24 GMT
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To: djgpp AT delorie DOT com
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Sterten AT aol DOT com wrote:
>>DJGPP already supports 64-bit variables: there's the `long long'  data
>>type which is 64-bit wide.
> 
>  
> 
> very good ! Thanks. I didn't know that. Probably because it's  different
> in other compilers so when someone sends me a program which uses  64-bit
> then I can't compile it. 
>  
> #define int long long
> //#define %i %Li  , this doesn't work
> int  i,j;
> main(){
> i=13267364410352;
> m1:printf("short:%i  long:%Li\n",i,i); //this doesn't work. Why ?
> printf("short:%i  ",i);printf("long:%Li\n",i); //this works
> if(i%2==0){i=i/2;goto  m1;}
> }
> 


  /* If you *must* use the same code with multiple types, don't do it by
     #defining built-in types to have some other meaning.  Also, use the
     correct specifiers ('%Li' is always incorrect).  Notice the way I
     have introduced the substitutable format with the define. */

#include <stdio.h>
typedef long long INTEGER;
#define INTEGER_FORMAT "%lld"

int main(void)
{
     INTEGER i = 4611686018427387903ll;

     do {
         printf("long:" INTEGER_FORMAT "\n", i);
         i /= 2;
     } while (i % 2);
     return 0;
}

[output]
long:4611686018427387903
long:2305843009213693951
long:1152921504606846975
long:576460752303423487
long:288230376151711743
long:144115188075855871
long:72057594037927935
long:36028797018963967
long:18014398509481983
long:9007199254740991
long:4503599627370495
long:2251799813685247
long:1125899906842623
long:562949953421311
long:281474976710655
long:140737488355327
long:70368744177663
long:35184372088831
long:17592186044415
long:8796093022207
long:4398046511103
long:2199023255551
long:1099511627775
long:549755813887
long:274877906943
long:137438953471
long:68719476735
long:34359738367
long:17179869183
long:8589934591
long:4294967295
long:2147483647
long:1073741823
long:536870911
long:268435455
long:134217727
long:67108863
long:33554431
long:16777215
long:8388607
long:4194303
long:2097151
long:1048575
long:524287
long:262143
long:131071
long:65535
long:32767
long:16383
long:8191
long:4095
long:2047
long:1023
long:511
long:255
long:127
long:63
long:31
long:15
long:7
long:3
long:1