012
02.03.2008, 18:43 Uhr
Kest
saint
|
Hi!
Wenn in C++ und ein wenig Mathe:
| C++: |
#include <string>
#include <bitset>
#include <stdexcept>
#include <iostream>
#include <cmath>
unsigned long long to_u_long_long(const std::string& str){
const int ULL = sizeof(unsigned long long) * 8;
const int UL = sizeof(unsigned long) * 8;
if(str.length()<=UL)
return std::bitset<UL>(str).to_ulong();
return std::bitset<UL>(str, str.length()-UL).to_ulong()
+
(
std::bitset<UL>(str, 0, str.length()-UL).to_ulong()
*
static_cast<unsigned long long>(std::pow(static_cast<double>(2), UL))
);
}
std::string to_binaer(unsigned long long zahl){
std::string _t;
for(int i=sizeof(unsigned long long)*8-1; i>=0; i--)
_t.push_back( ((zahl>>i)&1)+'0' );
return _t;
}
int main()
{
std::string s;
while(true){
std::getline(std::cin, s);
if(s.length()>sizeof(unsigned long long)*8 || s==""){
std::cout << "falsche Eingabe" << std::endl;
continue;
}
try{
std::bitset<sizeof(unsigned long long)*8> bs(s);
}catch(std::invalid_argument){
std::cout << "keine gültige Binärzahl" << std::endl;
continue;
}
break;
}
unsigned long long l = to_u_long_long(s);
std::cout << l << std::endl;
std::cout << to_binaer(l);
}
|
--
Wenn man einen Hufschlag hört, sollte man >Pferd< denken und nicht >Zebra<. |
