Strange bit shifting result with gcc - am I missing something obvious?

[Boltar]

On 32 bit linux with gcc 4.2 I get unexpected results with this code:

main()
{
        int bits = 32;
        printf("%d\n",(int)1 << (int)32);
        printf("%d\n",(int)1 << bits);
}


The first printf gives a result of 0, the second gives 1. I checked
with sizeof() and ints are definately 32 bits in size.

I'm sure I'm missing something obvious but can someone tell me what?

Thanks

B2003