Arduino Time Library

i trying seed srand() random, more random result, tried using c++

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#include <ctime.h> library. compiler said there no such library, downloaded arduino

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#include <time.h> library, compiler gave me errors that, too. errors compiler gave me below. can me decipher errors on time.h one? also, library , command should use seed srand()? compiler error attached below.

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srand(time(null));

the time library not going provide useful seed srand. if need use else try

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#include <timelib.h>

the usual way try quasi-random seed read voltage on analog input not connected anything.

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 srand(analogread(a0));

pete

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