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  1. #include <iostream>
  2. #include <cstring>
  3. #include <cmath>
  4. #include <cstdlib>
  5. #include <string>
  6.  
  7. double dec2Bin(int value, char binaryString[])
  8. {
  9.     int x = 1;
  10.     std::string hold = "";
  11.     while(x <= value){
  12.         x *= 2;
  13.     }
  14.     x /= 2;
  15.  
  16.     while(x >= 1){
  17.         //cout << x << " ";
  18.         if(value > x){
  19.             hold += "1";
  20.             value -= x;
  21.         }
  22.         else if(value < x){
  23.             hold += "0";
  24.         }
  25.         else if(value == x){
  26.             hold += "1";
  27.             value = 0;
  28.             //return hold;
  29.         }
  30.         x /= 2;
  31.  
  32.         //cout << hold << endl;
  33.     }
  34.     return atoi(hold.c_str());
  35.  
  36. }
  37. int main()
  38. {
  39.     char binstr[100];
  40.     int num = 0;
  41.     std::cout << "Enter a decimal string: ";
  42.     std::cin >> num;
  43.     std::cout << "its "<<dec2Bin(num, binstr) << std::endl;
  44.  
  45. }
Success #stdin #stdout 0s 3100KB
comments (?)
stdin
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Standard input is empty
stdout
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Enter a decimal string: its 0
https://ideone.com/bK1Wwm
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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