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// Programmieren 1, Praktikum 2, Aufgabe 2
// Sven Eisenhauer
// 29.10.2004
//
// file: prg1p2_2.cpp
//
// purpose: convert bin to dec numbers or dec numbers to bin
// 10 digits mean 2exp9 to 2exp0
//
#include <iostream>
#include <cmath>
using std::cin;
using std::cout;
using std::endl;
int main()
{
const iBit=10; //define how large the binary output should be.
int iMode;
int iBin=0;
int iActualFactor=0;
int iDec=0;
int iCounter=0;
int iCounter2=0;
//int iBinOut[iBit];
int iBinOut=0;
do
{
system("cls");
cout << "Please select Converter:\n1) Bin -> Dec\n2) Dec -> Bin\n\n0) End\n\n"
"Your selection: ";
cin >> iMode;
switch (iMode) {
case 1:
cout << "\nPlease enter a binary number (max 10 characters): ";
cin >> iBin;
for (iCounter = 9;iCounter>=0;iCounter--)
{
iActualFactor=iBin/pow(10,iCounter);
iDec+=(iActualFactor * static_cast <int> (pow(2,iCounter)));
iBin=iBin%static_cast <int>(pow(10,iCounter));
}
cout << "\nDecimal: " << iDec;
cout << endl;
system ("pause");
break; // end bin2dec
case 2://dec2bin
cout << "\nPlease enter a decimal number: ";
cin >> iDec;
cout << "\n"<<iBit<<"-bit Integer is: ";
/* // fill the array
for (iCounter=iBit-1;iCounter>=0;iCounter--)
{
iBinOut[iCounter]=iDec%2;
iDec=iDec/2;
}
// print array in reverse order
for (iCounter=0;iCounter<=iBit-1;iCounter++)
{
cout << iBinOut[iCounter];
if (0==((iCounter+1)%4)) // space separator after 4 bit
cout <<" ";
}
*/
iBinOut=0;
for (iCounter2=iBit;iCounter2>=0;iCounter2--)
{
iBin=iDec%2;
iDec=iDec/2;
iBinOut += iBin * static_cast <int> (pow(10,iBit-iCounter2));
}
cout << iBinOut << endl;
system ("pause");
break; // end dec2bin
case 0: // end selected... we are leaving...
break;
default: // wrong selection
cout << "\n !! No functon selected !!";
} // end switch
} // end while
while (iMode != 0);
return 0; // so far, we are ok
}// end main
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