Cpp

int intlog(double base, double x) {
    return (int)(log(x) / log(base));
}

[Mathematics] log10x = log10(x) [In C++ Programming]

#include <math.h>       /* log */

 double param, result;
  param = 10;
  result = log (param);
  printf ("log(%f) = %f
", param, result );

double log10(double x)

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