fork download
copy 
  1. /* strtoul binary-to-decimal example */
  2.  
  3.  
  4. #include<iostream>
  5. #include<cstring>
  6. #include<cstdint>
  7. #include<cstdlib>
  8.  
  9. #define BINARY_BASE 2 /*Defining binary base*/
  10. #define OCTAL_BASE 8  /*Defining octal base*/
  11. #define DECIMAL_BASE 10 /*Defining decimal base*/
  12. #define HEXA_BASE 16	/*Defining hexa-decimal base*/
  13. #define BASE32_BASE 32 /*Defining base32 base*/
  14.  
  15. bool isValidNumber4Base(const char* __numStr,int __base)
  16. {
  17.  
  18.     const char *__validBinary = "01";
  19.     const char *__validOctal = "01234567";
  20.     const char *__validDecimal = "0123456789";
  21.     const char *__validHex = "0123456789abcdefxABCDEFX";
  22.     const char *__validBase32 = "0123456789abcdefghijklmnopqrstuvABCDEFGHIJKLMNOPQRSTUV";
  23.     const char *__validNumber = NULL;
  24.  
  25.     __validNumber = (__base == BINARY_BASE) ? __validBinary : ((__base == OCTAL_BASE) ? __validOctal :
  26.                     (__base == DECIMAL_BASE) ? __validDecimal : (__base == HEXA_BASE) ? __validHex : (__base == BASE32_BASE) ? __validBase32 : NULL);
  27.  
  28.     if(__validNumber ==  NULL)
  29.     {
  30.         std::cerr<<"Invalid base encountered"<<std::endl;
  31.         exit(EXIT_FAILURE);
  32.     }
  33.  
  34.     return (!__numStr[strspn(__numStr,__validNumber)]) ? true : false;
  35. }
  36.  
  37. uint64_t getDecimal4mBinary(const char *__binaryStr)
  38. {
  39.     if (isValidNumber4Base(__binaryStr,BINARY_BASE))
  40.     {
  41.         char *__endBinaryStr;
  42.         return strtoull(__binaryStr,&__endBinaryStr,BINARY_BASE);
  43.     }
  44.  
  45.     else
  46.     {
  47.         std::cerr<<"Invalid binary-number encountered"<<std::endl;
  48.         exit(EXIT_FAILURE);
  49.     }
  50. }
  51.  
  52. /*Test Method */
  53. int main ()
  54. {
  55.   char *binary_str = "10000001";
  56.   uint64_t dec4mBinary = getDecimal4mBinary(binary_str);	
  57.   std::cout<<"Decimal equivalent\n"<<dec4mBinary<<std::endl;		
  58.   return 0;
  59. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Decimal equivalent
129
https://ideone.com/CIOkUM
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!