What's the maximum integer in C?

zacharyleung · Post by **zacharyleung** » Mon Mar 15, 2004 10:28 am

I believe it's 2^31 - 1. The thing is when I want to write code like the following

min = Integer.MAX_VALUE
for( i = ...)
if( min < value )
min = vale

So what is the maximum value, or where can I find it?

Thanks!

Adrian Kuegel · Post by **Adrian Kuegel** » Mon Mar 15, 2004 11:55 am

Yes, 2^31 - 1 is maximum integer in C.
You can include <limits.h> and use INT_MAX

horape · Post by **horape** » Tue Mar 16, 2004 1:16 am

C doesn't define it. You can use limits.h to check the values available on your platform.

On the judge, int goes from -2^31 to 2^31-1, unsigned int from 0 to 2^32-1, long long -2^63 to 2^63-1 and unsigned long long 0 to 2^64-1.

Saludos,
HoraPe

zacharyleung · Post by **zacharyleung** » Tue Mar 16, 2004 3:24 am

Ah, ok, thanks!

Krzysztof Duleba · Post by **Krzysztof Duleba** » Tue Mar 16, 2004 5:29 pm

horape, you're right only to some extend. C standard does define that

1=sizeof(char) <=sizeof(short) <= sizeof(int) <=sizeof(long) <=sizeof(long long)

and that
char stores at least 1 byte
short stores at least 2 bytes
long stores at least 4 bytes
long long stores at least 8 bytes.

Everything else is up to compiler.