Calculating Ranges of Data Types in C

Question

I\'m working through K&R Second Edition, and can\'t figure out why I\'m getting a certain result. The problem I\'m solving is calculating upper and lower limits for data

Answer 1

When you perform the bit shift on i, the compiler sees that i is a signed quantity, and performs an arithmetic right shift. It seems like you want that line of code to perform a logical right shift.

Change the line

i >>= 1;

to

i = ((unsigned int)i) >> 1;

Then it works!

Output:
Upper limit: 2147483647
Lower limit: -2147483648