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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. // A modified version of Lightness Races in Orbit's code given here: http://stackoverflow.com/a/37861479/3555000
  4. // I thank Lightness Races in Orbit for the contribution
  5. void print_binary(long double y)
  6. {
  7.     const long double x = y;
  8.     unsigned char     a[sizeof(long double)];
  9.  
  10.     copy(
  11.         reinterpret_cast<const unsigned char*>(&x),
  12.         reinterpret_cast<const unsigned char*>(&x) + sizeof(long double),
  13.         &a[0]
  14.     );
  15.     for (auto el : a)
  16.     {
  17.         bitset<8>k(el);
  18.         cout << k.to_string() ;
  19.     }
  20.  
  21.     cout << endl;
  22. }
  23.  
  24. int main()
  25. {
  26.     int a[] = {20,29,31}, res=0;
  27.     for(int i = 0; i<3; i++)
  28.     {
  29.         cout<<"i = "<<i<< ", a["<<i<< "] = "<<a[i]<<"\npow(" << a[i] <<","<<i+1 << "):\nBinary: ";
  30.         long double temp = pow(a[i],i+1);
  31.         print_binary(temp);
  32.         res+=temp;
  33.         cout<<setprecision(50)<<fixed<< "Decimal: " <<temp <<", Result = "<<res<<endl;
  34.     }
  35.     return 0;
  36. }
  37.  
Success #stdin #stdout 0s 3416KB
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stdin
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Standard input is empty
stdout
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i = 0, a[0] = 20
pow(20,1):
Binary: 000000000000000000000000000000000000000000000000000000001010000000000011010000000000000000000000
Decimal: 20.00000000000000000000000000000000000000000000000000, Result = 20
i = 1, a[1] = 29
pow(29,2):
Binary: 000000000000000000000000000000000000000000000000010000001101001000001000010000000000000000000000
Decimal: 841.00000000000000000000000000000000000000000000000000, Result = 861
i = 2, a[2] = 31
pow(31,3):
Binary: 000000000000000000000000000000000000000000000000101111101110100000001101010000000000000000000000
Decimal: 29791.00000000000000000000000000000000000000000000000000, Result = 30652
https://ideone.com/Gizghz
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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