long long int in C, Mac OS X, Xcode 3.2.5, field width

In this sample:

long long int x = 1<<开发者_C百科;38;
NSLog(@"Hello, World!, %qi", x);

I got "warning: left shift count >= width of type", and the value zero for x.

The length of a long long int is 8, so we should be able to shift up 63.

I'se puzzled....And would sho' 'preciate some help.

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It's not x that's the problem, it's the 1, which is a signed integer literal constant.

Try this instead:

long long int x = 1LL << 38;