check.cpp

#include <cfloat>
#include <cmath>
#include <cstdint>
#include <iostream>


int main(void){
  float f;
  uint64_t correct = 0;
  uint64_t tried   = 0;
  for (f=0.0f; f<INFINITY; f = nextafterf(f, INFINITY)) {
    tried++;
    if (log(exp(f)) == f) correct++;
    if (tried % 10000 == 0) std::cout << std::string(20,'\b') << (double)tried/pow(2, 31);
  }
  std::cout << "\ncorrect: " << (double)correct/(double)tried * 100.0 << "%" << std::endl;
}