::= ; | = ;

// ::= int | float

// ::= A | B | C | D | E

// ::= |

// ::= |

// ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

// ::= .

//

// Input is entered at the keyboard.

// If the input is correct, the program should print

// "no error found", otherwise, it should print the type

// of error and terminate its execution. There are four

// possible errors:

//

// "unrecognizable type"

// "illegal variable name"

// "unexpected number"

// "; expected"

//

// Error message is printed out by calling function

// "error". An error code ranging from 0 to 4 can be

// passed as an argument to the function indicating what

// message is to be printed. The mapping from the error

// code to the message can be found by looking at the

// definition of function "error".

//

// The following are some sample input and the response

// from the program:

//

// Please enter a declaration in format [= number] ;

// int A;

// no error found

//

// Please enter a declaration in format [= number] ;

// int a;

// illegal variable name

//

// Please enter a declaration in format [= number] ;

// short B;

// unrecognizable type

//

// Please enter a declaration in format [= number] ;

// float C = 0.5;

// no error found

//

// Please enter a declaration in format [= number] ;

// int A = 10,

// unexpected token

//

// Other sample input:

// float B;

// float C=0.2;

// short D;

// float F;

//

// The last two sample inputs should generate errors because "short" and "F" are

// not acceptable tokens.

#include

#include

using namespace std;

string GetToken();

void error(int);

int main() {

string token;

cout << "Please enter a declaration in format "

<< " [= number] ;" << endl;

token = GetToken();

// Write the code here

error(0);

return 0;

}

string GetToken() {

// Use the Gettoken function you have designed in Lab 1.

}

void error(int code) {

switch (code) {

case 0: cout << "no errors found" << endl; break;

case 1: cout << "unrecognizable type" << endl; break;

case 2: cout << "illegal variable name" << endl; break;

case 3: cout << "unexpected number" << endl; break;

case 4: cout << "; expected" << endl;

}

return;

}