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0

My method is setting bit in each elements of the int array. Althought the program works with the case where the string str="11111...111" (all the bit is 1)
However, in case as the string str="100...000" (63 zero numbers)(the first bit is 1 and the rest are 0) the problem occurs, my int array is 0,0,0,1 it has to be 0,0,1,0
Please give me a solution with my code, if your idea is better, tell me so i can fix the problem soon.

int arr[4]=0;
void convert(string str)
 

 int length = str.length();
 for (int i = length - 1; i >= 0; i--)
 
 if (str[i] == '1')
 arr[pos];
 
 
 

If the string has 1000...00 (32 0 numbers ), the int array has to be 0,0,1,0
If the string has 1000...00 (63 0 numbers), the int array has to be 0,1,0,0

c++ biginteger

share|improve this question

edited Mar 26 at 14:37

F.Wu

asked Mar 26 at 13:36

F.WuF.Wu

3055 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Please read the help pages, especially "What topics can I ask about here?" and "What types of questions should I avoid asking?". Also take the tour and read about how to ask good questions and this question checklist. Lastly learn how to create a minimal reproducible example.
  
  – Some programmer dude
  Mar 26 at 13:42
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  what is "the problem" ? btw using std::bitset makes bit fiddling much simpler
  
  – formerlyknownas_463035818
  Mar 26 at 13:42
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  half of this sentence seems to be missing: "However, in case as the string str="100...000" (...)" .. what happens in that case?
  
  – formerlyknownas_463035818
  Mar 26 at 13:43
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  That pointer you’re returning becomes invalid as soon as the function returns. Return std::array or pass the array into the function.
  
  – molbdnilo
  Mar 26 at 14:04
  

  
  
  
  


• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  @F.Wu Attempts to fix bugs by adding code are very seldom successful. Sit down and work out the logic (preferrably away from the keyboard) instead of trying to handle special cases.
  
  – molbdnilo
  Mar 26 at 14:44
  
  

  
  
  
  

 | 
show 12 more comments

0

My method is setting bit in each elements of the int array. Althought the program works with the case where the string str="11111...111" (all the bit is 1)
However, in case as the string str="100...000" (63 zero numbers)(the first bit is 1 and the rest are 0) the problem occurs, my int array is 0,0,0,1 it has to be 0,0,1,0
Please give me a solution with my code, if your idea is better, tell me so i can fix the problem soon.

int arr[4]=0;
void convert(string str)
 

 int length = str.length();
 for (int i = length - 1; i >= 0; i--)
 
 if (str[i] == '1')
 arr[pos];
 
 
 

If the string has 1000...00 (32 0 numbers ), the int array has to be 0,0,1,0
If the string has 1000...00 (63 0 numbers), the int array has to be 0,1,0,0

c++ biginteger

share|improve this question

edited Mar 26 at 14:37

F.Wu

asked Mar 26 at 13:36

F.WuF.Wu

3055 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Please read the help pages, especially "What topics can I ask about here?" and "What types of questions should I avoid asking?". Also take the tour and read about how to ask good questions and this question checklist. Lastly learn how to create a minimal reproducible example.
  
  – Some programmer dude
  Mar 26 at 13:42
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  what is "the problem" ? btw using std::bitset makes bit fiddling much simpler
  
  – formerlyknownas_463035818
  Mar 26 at 13:42
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  half of this sentence seems to be missing: "However, in case as the string str="100...000" (...)" .. what happens in that case?
  
  – formerlyknownas_463035818
  Mar 26 at 13:43
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  That pointer you’re returning becomes invalid as soon as the function returns. Return std::array or pass the array into the function.
  
  – molbdnilo
  Mar 26 at 14:04
  

  
  
  
  


• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  @F.Wu Attempts to fix bugs by adding code are very seldom successful. Sit down and work out the logic (preferrably away from the keyboard) instead of trying to handle special cases.
  
  – molbdnilo
  Mar 26 at 14:44
  
  

  
  
  
  

 | 
show 12 more comments

My method is setting bit in each elements of the int array. Althought the program works with the case where the string str="11111...111" (all the bit is 1)
However, in case as the string str="100...000" (63 zero numbers)(the first bit is 1 and the rest are 0) the problem occurs, my int array is 0,0,0,1 it has to be 0,0,1,0
Please give me a solution with my code, if your idea is better, tell me so i can fix the problem soon.

int arr[4]=0;
void convert(string str)
 

 int length = str.length();
 for (int i = length - 1; i >= 0; i--)
 
 if (str[i] == '1')
 arr[pos];
 
 
 

If the string has 1000...00 (32 0 numbers ), the int array has to be 0,0,1,0
If the string has 1000...00 (63 0 numbers), the int array has to be 0,1,0,0

c++ biginteger

share|improve this question

edited Mar 26 at 14:37

F.Wu

asked Mar 26 at 13:36

F.WuF.Wu

3055 bronze badges

int arr[4]=0;
void convert(string str)
 

 int length = str.length();
 for (int i = length - 1; i >= 0; i--)
 
 if (str[i] == '1')
 arr[pos];
 
 
 

share|improve this question

edited Mar 26 at 14:37

F.Wu

asked Mar 26 at 13:36

F.WuF.Wu

3055 bronze badges

share|improve this question

edited Mar 26 at 14:37

F.Wu

asked Mar 26 at 13:36

F.WuF.Wu

3055 bronze badges

asked Mar 26 at 13:36

F.WuF.Wu

3055 bronze badges

asked Mar 26 at 13:36

F.WuF.Wu

3055 bronze badges

1 Answer
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0

So i have found a solution for my own problem. Please help me test my code then let me know if any test cases make errors. Thank you.

class QInt

private:
 int Data[4];
public:
QInt()

 for (int i = 0; i < 4; i++)
 
 Data[i] = 0;
 



QInt QInt::StrBinToQInt(string str)

 QInt temp=QInt();
 str = creString128(str);
 cout << str.length() << endl;
 cout << str << endl;
 for (int i = 127; i >= 0; i--)
 
 int pos;
 if (str[i] == '1')
 
 pos = i / 32;
 int k = (127-i) % 32;
 if (i % 32 == 0)
 
 pos--;
 k = 0;
 
 if (str[0] == '1')
 
 pos = 0;
 k = 30;
 
 temp.Data[pos] = (1 << k) 
 
 return temp;


;

string creString(int n)

 string temp;
 for (int i = 0; i < n; i++)
 
 temp += '0';
 
 return temp;


string creString128(string bin)

 string corrBin = creString(128 - bin.length());
 corrBin += bin;
 return corrBin;

share|improve this answer

answered Mar 29 at 14:04

F.WuF.Wu

3055 bronze badges

add a comment | 

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0

So i have found a solution for my own problem. Please help me test my code then let me know if any test cases make errors. Thank you.

class QInt

private:
 int Data[4];
public:
QInt()

 for (int i = 0; i < 4; i++)
 
 Data[i] = 0;
 



QInt QInt::StrBinToQInt(string str)

 QInt temp=QInt();
 str = creString128(str);
 cout << str.length() << endl;
 cout << str << endl;
 for (int i = 127; i >= 0; i--)
 
 int pos;
 if (str[i] == '1')
 
 pos = i / 32;
 int k = (127-i) % 32;
 if (i % 32 == 0)
 
 pos--;
 k = 0;
 
 if (str[0] == '1')
 
 pos = 0;
 k = 30;
 
 temp.Data[pos] = (1 << k) 
 
 return temp;


;

string creString(int n)

 string temp;
 for (int i = 0; i < n; i++)
 
 temp += '0';
 
 return temp;


string creString128(string bin)

 string corrBin = creString(128 - bin.length());
 corrBin += bin;
 return corrBin;

share|improve this answer

answered Mar 29 at 14:04

F.WuF.Wu

3055 bronze badges

add a comment | 

0

So i have found a solution for my own problem. Please help me test my code then let me know if any test cases make errors. Thank you.

class QInt

private:
 int Data[4];
public:
QInt()

 for (int i = 0; i < 4; i++)
 
 Data[i] = 0;
 



QInt QInt::StrBinToQInt(string str)

 QInt temp=QInt();
 str = creString128(str);
 cout << str.length() << endl;
 cout << str << endl;
 for (int i = 127; i >= 0; i--)
 
 int pos;
 if (str[i] == '1')
 
 pos = i / 32;
 int k = (127-i) % 32;
 if (i % 32 == 0)
 
 pos--;
 k = 0;
 
 if (str[0] == '1')
 
 pos = 0;
 k = 30;
 
 temp.Data[pos] = (1 << k) 
 
 return temp;


;

string creString(int n)

 string temp;
 for (int i = 0; i < n; i++)
 
 temp += '0';
 
 return temp;


string creString128(string bin)

 string corrBin = creString(128 - bin.length());
 corrBin += bin;
 return corrBin;

share|improve this answer

answered Mar 29 at 14:04

F.WuF.Wu

3055 bronze badges

add a comment | 

So i have found a solution for my own problem. Please help me test my code then let me know if any test cases make errors. Thank you.

class QInt

private:
 int Data[4];
public:
QInt()

 for (int i = 0; i < 4; i++)
 
 Data[i] = 0;
 



QInt QInt::StrBinToQInt(string str)

 QInt temp=QInt();
 str = creString128(str);
 cout << str.length() << endl;
 cout << str << endl;
 for (int i = 127; i >= 0; i--)
 
 int pos;
 if (str[i] == '1')
 
 pos = i / 32;
 int k = (127-i) % 32;
 if (i % 32 == 0)
 
 pos--;
 k = 0;
 
 if (str[0] == '1')
 
 pos = 0;
 k = 30;
 
 temp.Data[pos] = (1 << k) 
 
 return temp;


;

string creString(int n)

 string temp;
 for (int i = 0; i < n; i++)
 
 temp += '0';
 
 return temp;


string creString128(string bin)

 string corrBin = creString(128 - bin.length());
 corrBin += bin;
 return corrBin;

share|improve this answer

answered Mar 29 at 14:04

F.WuF.Wu

3055 bronze badges

class QInt

private:
 int Data[4];
public:
QInt()

 for (int i = 0; i < 4; i++)
 
 Data[i] = 0;
 



QInt QInt::StrBinToQInt(string str)

 QInt temp=QInt();
 str = creString128(str);
 cout << str.length() << endl;
 cout << str << endl;
 for (int i = 127; i >= 0; i--)
 
 int pos;
 if (str[i] == '1')
 
 pos = i / 32;
 int k = (127-i) % 32;
 if (i % 32 == 0)
 
 pos--;
 k = 0;
 
 if (str[0] == '1')
 
 pos = 0;
 k = 30;
 
 temp.Data[pos] = (1 << k) 
 
 return temp;


;

string creString(int n)

 string temp;
 for (int i = 0; i < n; i++)
 
 temp += '0';
 
 return temp;


string creString128(string bin)

 string corrBin = creString(128 - bin.length());
 corrBin += bin;
 return corrBin;

share|improve this answer

answered Mar 29 at 14:04

F.WuF.Wu

3055 bronze badges

answered Mar 29 at 14:04

F.WuF.Wu

3055 bronze badges

answered Mar 29 at 14:04

F.WuF.Wu

3055 bronze badges