From The Compiler, 5 Years ago, written in C.
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  1. #include <stdio.h>
  2.  
  3. int main(int argc, const char *argv[])
  4. {
  5.     int start = 100;
  6.     int val = 10;
  7.     int out1, out2;
  8.  
  9.     out1 = start - --val;
  10.     val = 10;
  11.     out2 = start ---val;
  12.  
  13.     printf("- --: %d\n", out1);
  14.     printf("---: %d\n", out2);
  15.  
  16.     return 0;
  17. }
  18.