void task4_6::solution::calculate()
{
std::vector< std::string > strs;
for ( int i = 0; i < lines_.size(); ++i )
{
try
{
boost::split( strs, lines_[i], boost::is_any_of( "=" ) );
if ( strs.size() > 2 )
{
throw std::logic_error( "not correct expression at %1% line" );
}
std::string var_name = boost::trim_copy( strs[0] );
std::string expression = boost::trim_copy( strs[1] );
if(vars_.find( var_name ) != vars_.end())
{
throw std::logic_error(
( boost::format( "such variable '%1%' already exists (%2%)" )
% var_name % "%1%" ).str() );
}
vars_[ var_name ] = calculate_rpn( to_rpn( expression ) );
}
catch ( const std::logic_error& e )
{
throw std::logic_error( ( boost::format( e.what() ) % ( i + 1 ) ).str() );
}
}
}
int main( int argc, char *argv[] )
{
(void) argc;
(void) argv;
std::cout << "Enter string for calculation: ";
std::string input;
std::getline(std::cin, input);
std::cout << std::endl;
std::chrono::high_resolution_clock clock;
auto start = clock.now();
try {
const auto& tokens = to_tokens(input);
std::cout << "tokens:" << std::endl;
std::for_each(tokens.begin(), tokens.end(), [&tokens](const token& t) {
std::cout << "value: " << t.get_value() << " type: " << t.get_type() << std::endl;
});
std::cout << std::endl;
if(tokens.empty()) {
throw std::runtime_error("Invalid tokens: empty input string");
}
const auto& rpn = to_rpn(tokens);
std::cout << "RPN:" << std::endl;
std::for_each(rpn.begin(), rpn.end(), [&tokens](const token& t) {
std::cout << "value: " << t.get_value() << " type: " << t.get_type() << std::endl;
});
std::cout << std::endl;
if(rpn.empty()) {
throw std::runtime_error("Invalid rpn: empty input string");
}
const auto& result = calculate<double>(rpn, std::atof);
std::cout << "result: " << result << std::endl;
}
catch(const std::exception& error) {
std::cout << "Error: " << error.what() << std::endl;
}
auto end = clock.now();
std::cout << "Input size: " << input.size() << " calculate: " << std::chrono::duration_cast<std::chrono::microseconds>(end - start).count() << " us" << std::endl;
return 0;
}
