data type... (long int, long long int)

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bidol
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Joined: Sun Jul 10, 2005 1:14 pm

data type... (long int, long long int)

Post by bidol »

hi,

i don't know how 'long long int' work.

for example,

i hava input...
1 2
3 4
5 6
7 8
and first code,

Code: Select all

#include <stdio.h> 
 int main() 
{ 
   long long int a, b; 
  
   while (scanf ("%lld%lld",&a, &b)!=EOF){ 
	   printf("%lld   %lld\n", a, b);
   } 
return 0;
gives output
1 0
3 0
5 0
7 0
and second code,

Code: Select all

#include <stdio.h> 
int main() 
{ 
   long int a, b; 
  
   while (scanf ("%ld%ld",&a, &b)!=EOF){ 
	   printf("%ld   %ld\n", a, b);
   } 
return 0;
}
now, it gives output,
1 2
3 4
5 6
7 8

the first code use 'long long int' and secode cod use 'long int'
other things equal, in both code.

but the output is different.

of course, second one is right.
and first output is quite strange for me... i can't understand...

can anybody help me?...
sorry, i'm not good at english.

ayon
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Posts: 161
Joined: Tue Oct 25, 2005 8:38 pm
Location: buet, dhaka, bangladesh

Post by ayon »

your compiler doesn't support long long data type correctly, but the judge's compiler does
ishtiak zaman
----------------
the world is nothing but a good program, and we are all some instances of the program

jan_holmes
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Posts: 136
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Post by jan_holmes »

I don't know why, but I think it is more safe if you use cin and cout rather than scanf() and printf()...

Code: Select all

#include <stdio.h> 
#include <iostream>

using namespace std; 

int main() 
{ 
   long long a = 0; 
   long long b = 0;
  
   while (cin >> a >> b){ 
      cout << a << b << "\n"; 
   } 
   return 0;
} 

jtmh
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Location: Taiwan

Post by jtmh »

If you compile on Windows, using "%I64d" instead of "%lld" may work.
Last edited by jtmh on Sun Jul 16, 2006 8:28 pm, edited 1 time in total.

emotional blind
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Post by emotional blind »

jan_holmes,
which compiler do u use?
i found this particular situation on QUINCY

BTW, holmes is my most fevourite character.
what is ur full name?

jan_holmes
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Post by jan_holmes »

I'm using dev cpp... My real name is not related to holmes actually... :P I also like sherlock holmes... :D nice to meet you... btw, what kind of situation are you talking about ??? :oops:

emotional blind
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Post by emotional blind »

I was talking about the situation:
the problem with printf("%lld",value);

barlow
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Joined: Mon Nov 20, 2006 5:47 pm

Post by barlow »

I am also coding with Dev CPP, 4.9.9.2 and I'm interested how to print unsigned long long numbers with printf ?

Jan
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Post by Jan »

For Vcc (windows) use "%I64u", and for Gcc (Linux) use "%llu". I havent used Dev CPP. So, I dont know the identifier of 'unsigned long long' for Dev CPP. Try using any of the given. Hope it works.
Ami ekhono shopno dekhi...
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