From: porkchop@invalid.foo   
      
   On Tue, 23 Dec 2025 21:44:04 -0800, Chris M. Thomasson wrote:   
      
   > On 12/22/2025 12:48 AM, Michael Sanders wrote:   
   >> Is it incorrect to use 0 (zero) to seed srand()?   
   >>   
   >> int seed = (argc >= 2 && strlen(argv[1]) == 9)   
   >>             ? atoi(argv[1])   
   >>             : (int)(time(NULL) % 900000000 + 100000000);   
   >>   
   >> srand(seed);   
   >>   
   >   
   > Forgive me for C++, but this RNG of mine might be useful for detecting   
   > the state of a system:   
   >   
   > https://groups.google.com/g/comp.lang.c++/c/7u_rLgQe86k/m/fYU9SnuAFQAJ   
      
   My aims (mostly just learning my around C at this point)   
   are *much* more simple. I needed something that is   
   seed-able/deterministic/portable allowing the user a   
   shot at replaying a round in a silly game I've been   
   working on every now & again:   
      
   int genseed(int seed_in) {   
       if (seed_in >= 10000000) return seed_in;   
       unsigned long t = (unsigned long)time(NULL);   
       unsigned long c = (unsigned long)clock();   
       return (int)(((t ^ c) % 80000000UL) + 10000000UL);   
   }   
      
   --   
   :wq   
   Mike Sanders   
      
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