Question
Please help me Write the program in C++ is an interpreter, below this part of the program. I need you to do the , and
Please help me
Write the program in C++ is an interpreter, below this part of the program. I need you to do the
#include
using namespace std;
bool isSign(char);
bool isDigit(char);
bool isDecimalPoint(char);
bool isInt(const string&);
bool isUnsign(const string&);
bool decPart(const string&);
bool isReal(const string&);//still needs implementation
bool isExponent(const string&);
bool expPart(const string&);
bool isNumber(const string&);//still needs implementation
int main()
{
const string num = "e";
cout
cout
cin.get();
}
bool isSign(const char ch)
{
return ch == '+' || ch == '-';
}
bool isDigit(const char ch)
{
return std::isdigit(static_cast(ch));
}
bool isDecimalPoint(const char ch)
{
return ch == '.';
}
bool isInt(const string& str)
{
if (str.length() == 1)
return isUnsign(str);
if (isSign(str[0]) || isDigit(str[0]))
{
if (isSign(str[0]) && !isDigit(str[1]))
return false;
const auto temp = str.substr(1);
return isUnsign(temp);
}
return false;
}
bool isUnsign(const string& str)
{
if (str.length() == 0)
return false;
for (const auto& i : str)
if (!isDigit(i))
return false;
return true;
}
bool decPart(const string& str)
{
if (isDecimalPoint(str[0]) && str.length() >= 2)
{
const auto temp = str.substr(1);
return isUnsign(temp);
}
return false;
}
bool isReal(const string&)//still needs implementation
{
return true;
}
bool isExponent(const string& input)
{
return (input[0] == 'E' || input[0] == 'e') && (input.length() == 1);
}
bool expPart(const string& str)
{
if(isExponent(str.substr(0,1)) && str.length()>1)
{
const auto pos = str.find('.');
if (pos == string::npos)
return false;
const auto temp = str.substr(1, pos - 1);
if(isInt(temp))
{
const auto temp2 = str.substr(pos);
if (decPart(temp2))
return true;
}
}
return false;
}
bool isNumber(const string&)//still needs implementation
{
return true;
}
#include
using namespace std;
bool isRead(const string &);
bool isString(const string &);
bool isLetter(char);
bool isLetter(string);
string askInput();
bool isExponent(const string & input);
bool isRem(const string & input); //for comment statements
int main() {
while (true) {
string input = askInput();
cout
if (isString(input))
cout
//if (isLetter(input)) cout
if (isRead(input)) cout
if (isExponent(input)) cout
if (isRem(input)) cout
}
}
bool isRead(const string & input) {
const string read = "read";
if (read.compare(input) == 0)
return true;
else return false;
}
bool isString(const string & input) {
if (input[0] == '"' && input[input.length() - 1] == '"')
return true;
else return false;
}
string askInput() {
string in;
cout
getline(cin, in);
return in;
}
bool isLetter(char ch) {
if (isalpha(ch)) {
return true;
}
else return false;
//return isalpha(static_cast(ch)); puedes usar esto (Joseph)
}
bool isLetter(string s) {
if (s.length() == 1 && isalpha(s[0])) {
return true;
}
else return false;
}
bool isExponent(const string & input) {
if ((input[0] == 'E' || input[0] == 'e') && (input.length()==1))
{
return true;
}
else return false;
}
bool isRem(const string & input) {
if (input.compare("rem") == 0)
return true;
else return false;
}
//
//
#include
using namespace std;
bool isVariable(string);
bool isLetter(char var1)
{
if (isalpha(var1))
{
return true;
}
else return false;
}
//Variables
int main()
{
int i;
string var1;
cout
cout
cin >> var1;
if(isVariable(var1)){
cout
}
else cout
cin.get();
return 0;
}
bool isVariable(string s){
for(int i = 0; i
{
if (!(isalpha(s[i])))
{
return false;
}
}
return true;
}
//
#include
#include
using namespace std;
/*
::= =
*/
//Variables
int main()
{
char var1;
cout
cout
cin >> var1;
if(var1 != '=')
{
cout
}
else
{
cout
}
cin.get();
return 0;
}
//Relational and Logical Operator
#include
#include
using namespace std;
bool isLogical(string var1)
{
if(var1 == ".or." || var1 == ".and." || var1 == ".not.")
{
return true;
}
else
{
return false;
}
}
bool isRelational(string var1)
{
if(var1 == ".gt." || var1 == ".lt." || var1 == ".eq." || var1 == ".ge." || var1 == ".le." || var1 == ".ne.")
{
return true;
}
else
{
return false;
}
}
int main()
{
string var1;
cout
cout
cin >> var1;
if(var1 == ".or." || var1 == ".and." || var1 == ".not.")
{
if(isLogical(var1) == 1)
{
cout
}
else if (isLogical(var1) == 0)
{
cout
}
}
else
{
if(isRelational(var1) == 1)
{
cout
}
else if (isRelational(var1) == 0)
{
cout
}
}
cin.get();
return 0;
}
// ::= + | -
#include
#include
using namespace std;
bool isSign(string var1)
{
if(var1 == "-" || var1 == "+" )
{
return true;
}
else
{
return false;
}
}
int main()
{
string var1;
cout
cout
cin >> var1;
if(isSign(var1) == 1)
cout
else
cout
cin.get();
return 0;
}
Design and implement an interpreter that executes the code written in LAO language. The statements in LAO language are: comment statement> ::-REM I REM any string> assignment statement> ::variable>-arithmeticStep by Step Solution
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Visual C# And Databases
Authors: Philip Conrod, Lou Tylee
16th Edition
1951077083, 978-1951077082
