void calculate() // Performs calculations
{
while(true) try {
cout << prompt; // Output '>' symbol
Token t = ts.get(); // Get a new character
if (t.kind == help) { // If help was entered open help menu
cout << "Welcome to Awesome Calculator " << version << " ! Here is the list of the commands:\n"
"Available operators are '+','-','/','*'. The program is able to work with floating-point numbers\n"
"'Expression' + ';' - Prints the result (always use it at the end of the statement)\n"
"'let' + 'name of variable' + '='' + 'value' - defines a variable\n"
"'const' + 'name of constant' + '='' + 'value' - defines a constant\n"
"'name of variable' + '=' + 'new value' - assigns a new value to the variable\n"
"'pow(x,y)' - multiplies x by y times (y must be of type int)\n"
"'sqrt(x)' - returns square root of x\n"
"'h' or 'help' - opens this menu\n"
"'quit' - closes the program\n";
continue; // Move to next iteration
}
while (t.kind == print) t=ts.get(); // Read all ';'
if (t.kind == quit) return; // Close the program if exit was entered
ts.unget(t); // Return a character into the stream
cout << result << statement() << endl; // Output the result
}
catch(runtime_error& e) {
cerr << e.what() << endl; // Cout the error if the exception was thrown
clean_up_mess(); // Ignores all characters till the ';'
}
}
void calculate()
{
const string prompt = "> ";
const string result = "= ";
while (cin) {
try {
bool displayed_help = false;
cout << prompt;
Token t = ts.get();
while (t.kind == print) t = ts.get();
if (t.kind == quit) return;
if (t.kind == help_lower) {
display_help();
displayed_help = true;
}
if (displayed_help == false) {
ts.putback(t);
cout << result << statement() << endl;
}
}
catch (exception& e) {
cerr << e.what() << endl;
clean_up_mess();
}
}
}
double calculateLoop()
{
double result = 0;
cout << "> ";
while (cin)
{
try
{
Token t = ts.get();
if(t.kind == QUIT)
break;
if(t.kind == PRINT) {
cout << "= " << result << endl << "> ";
while(t.kind == PRINT)
t = ts.get();
ts.putback(t);
continue;
}
ts.putback(t);
result = statement();
}
catch(exception &ex)
{
cerr << ex.what() << endl;
clean_up_mess();
cout << "> ";
}
}
return result;
}
//----------------------------------------------------------------------
void calculate(){
while(cin)try{
cout << '>';
Token t = ts.get();
if(t.kind == print) t=ts.get();
if(t.kind == 'q')return;
ts.putback(t);
cout<<statement()<<'\n';
}
catch(exception& e){
cerr<<e.what()<<'\n';
clean_up_mess();
}
}
void calculate()
{
while(true) try {
cout << prompt;
Token t = ts.get();
while (t.kind == print) t=ts.get();
if (t.kind == quit) return;
ts.unget(t);
cout << result << statement() << endl;
}
catch(runtime_error& e) {
cerr << e.what() << endl;
clean_up_mess();
}
}
void calculate()
{
while (cin)
try {
cout << prompt;
Token t = ts.get();
while (t.kind == print) t = ts.get();
if (t.kind == quit) return;
ts.putback(t);
cout << result << statement() << endl;
} catch (exception& e) {
cerr << e.what() << endl;
clean_up_mess();
}
}
void calculate() // Performs calculations
{
while(true) try {
cout << prompt; // Output '>' symbol
Token t = ts.get(); // Get a new character
while (t.kind == print) t=ts.get(); // Read all ';'
if (t.kind == quit) return; // Close the program if exit was entered
ts.unget(t); // Return a character into the stream
cout << result << statement() << endl; // Output the result
}
catch(runtime_error& e) {
cerr << e.what() << endl; // Cout the error if the exception was thrown
clean_up_mess(); // Ignores all characters till the ';'
}
}
void calculate()
{
while (cin)
try {
cout << prompt;
Token t = ts.get();
while (t.kind == print) t=ts.get(); // first discard all "prints"
if (t.kind == quit) return; // quit
ts.putback(t);
cout << result << statement() << endl;
}
catch (exception& e) {
cerr << e.what() << endl; // write error message
clean_up_mess();
}
}
void calculate() // expression evaluation loop
{
while (cin)
try{
cout << prompt;
Token t = ts.get();
while (t.kind == print) t = ts.get(); // first discard all "prints"
if (t.kind == quit) return;
ts.putback(t);
cout << result << expression() << '\n';
}
catch (exception& e) {
cerr << e.what() << '\n'; // write error message
clean_up_mess();
}
}
void calculate()
{
while(true) try {
cout << PROMPT;
Token t = ts.get();
while (t.kind == PRINT) t=ts.get();
if (t.kind == QUIT) return;
if (t.kind == HELP) help();
ts.unget(t);
cout << RESULT << statement() << endl;
}
catch(runtime_error& e) {
cerr << e.what() << endl;
clean_up_mess();
}
}
void calculate()
{
while(true) try {
cout << prompt;
Token t = ts.get();
while (t.kind == print) t=ts.get(); // 出力トーンを飲み込む
if (t.kind == quit) return; // 終了トークンの場合は終了する
ts.unget(t);
cout << result << statement() << endl;
}
catch(runtime_error& e) {
cerr << e.what() << endl;
if(!cin) // cinエラー後の復帰
cin.clear();
clean_up_mess();
}
}
void calculate(Token_stream& ts)
{
const string prompt = "> ";
const string result = "= ";
while (cin) {
try {
cout << prompt;
Token t = ts.get();
while (t.kind == print) t = ts.get();
if (t.kind == quit) return;
ts.putback(t);
cout << result << statement(ts) << endl;
}
catch (exception& e) {
cerr << e.what() << endl;
clean_up_mess(ts);
}
}
}
void calculate(){
while (cin){
try{
cout << prompt; // プロンプトを表示する
Token t = ts.get();
while(t.kind == print) t = ts.get(); // すべてのprintを破棄する
if(t.kind == help){ // ヘルプを表示する
cout << "Simple calculator help text" << endl;
continue;
}
if(t.kind == quit) return;
ts.putback(t);
cout << result << statement() << endl;
}
catch(exception& e){
cerr << e.what() << endl;
clean_up_mess();
}
}
}
void calculate()
/*Expression evaluation loop*/
{
while (cin) {
try {
cout << prompt;
Token t = ts.get();
while (t.kind == print)
t = ts.get();
if (t.kind == quit)
return;
ts.putback(t);
cout << result << statement() << "\n";
}
catch(runtime_error& e) {
cerr << "ERROR: " << e.what() << '\n'; //Write error message
clean_up_mess();
}
}//End while
}
void calculate()
{
//while there is input, check if it's an exit command (q), an execute command (;) or values for our token
while (cin)
try {
cout << prompt; //prompt to user
Token t = tokenStream.get();
while (t.kind == printResult) t = tokenStream.get();
if (t.kind == quit) return;
tokenStream.putback(t);
cout << result << statement() << endl;
}
catch(exception& e)
{
cerr<< e.what() << endl;
clean_up_mess();
}
}
