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  1. #include <string>
  2. using namespace std;
  3. double _string_to_double(string &s,unsigned short radix){
  4.     double n = 0, y = 1;
  5.     for (unsigned short x = s.size();x&&s[--x]^'-';)
  6.         if(s[x] ^ '.')
  7.         n+=( (s[x] - (s[x]<='9' ? '0':'0'+7) ) * y ), y*=radix;
  8.     else
  9.         n/=y, y = 1;
  10.     return s[0] ^ '-' ? n:n*-1;
  11. }
  12.  
  13. int main (){
  14.  
  15. string a = "184414124";
  16. for(unsigned long long x = 1000000;x>0;--x){
  17.  _string_to_double(a,10);
  18. }
  19. return 0;
  20. }
Success #stdin #stdout 0.09s 3468KB
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https://ideone.com/Cck4Z3
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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