I'm using the FNV hash as a hashing algorithm on my Hash Table implementation but I'm getting the warning in the question title on this line:
unsigned hash = 2166136261;
I don't understand why this is happening because when I do this:
printf("%u\n", UINT_MAX);
printf("2166136261\n");
I get this:
4294967295
2166136261
Which seems to be under the limits of my machine...
Why do I get the warning and what are my options to get rid of it?
unsigned hash = 2166136261u; // note the u.
You need a suffix u
to signify this is an unsigned number. Without the u
suffix it will be a signed number. Since
2166136261 > 2³¹ - 1 = INT_MAX,
this integer literal will be problematic.
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