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C/C++ Source or Header  |  1991-06-10  |  141 b   |  12 lines
  1. #include "f2c.h"
  2.  
  3. #define log10e 0.43429448190325182765
  4.  
  5. double r_lg10(x)
  6. real *x;
  7. {
  8. double log();
  9.  
  10. return( log10e * log(*x) );
  11. }
  12.