/* Input instructions 1. Enter number to be converted, then space or next line (by clicking enter button) 2. Base of number to be converted, then space or next line 3. Target base in which the number to be converted and press submit */ #include #include #include using Base = int; std::string const sym {"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"}; // convert character in any base to it's Base 10 equivalent inline size_t to_b_10(char cnum, Base b) { static std::string const& blsym(sym.substr(0, b)); auto pos = blsym.find(std::toupper(cnum)); if(std::string::npos == pos)throw -1; return pos; } // convert a whole number in any base to it's Base 10 equivalent. Does not use power function size_t any_b2b_10(std::string niab,Base b){ size_t nib10 = 0; for(size_t i=0,sz=niab.size()-1;i 0) { nrep = sym.at(num%b) + nrep; num/=b;} return nrep; } // Helper - Convert a number in Base "from" to number in Base "to". Also validate input void B2B(std::string num, Base from, Base to, std::string& result) { if((from>36||from<2) && (to>36 || to<2)){ std::cout << "Invalid base! Source and Destination Base must\nbe >= 2 and <= 36\n"; return; } if(from==to){result=std::move(num);return;} result=Tbase(any_b2b_10(num, from), to);} int main() { std::string num; Base fromb, tob; std::cin >> num >> fromb >> tob; std::string result; try { B2B(num, fromb, tob, result); } catch (int) { std::cout <<"Base conversion exception !\n" << "Probably invalid number in the given base"; } if(!result.empty()) std::cout << "number " << num << " " << "in Base " << fromb << " to Base " << tob << " = \n" << result;}

Base Converter.cpp