I am getting an error by the bool function 'expected unqualified - id before '{' toke

[RKVP123]

#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>

using namespace std;

//---Do not edit the following
//StartProvided
const int ERROR_CONVERSION = 1;
/*
Preconditions: Parameter is positive
Output stream is not in an error state
Postconditions: Ouput stream contains the lucas sequence up to given number of terms
Output stream is not in an error state
*/
void genLucasSequence(int intTerms);

/*
Preconditions: Parameter is a non-empty string
Postconditions: Boolean value indicating validity is returned
*/
bool isValidBinaryString(string strNumber);

/*
Preconditions: Parameter 2 and 3 are variable (non-literal, non const) integers
Postconditions: Parameter 2 and 3 are modified to contain appropriate boolean values
*/
void isPositiveAndEven(int intValue, bool& blnPositive, bool& blnEven);

/*
Preconditions: Parameter is positive
Postconditions: Vector containing terms of sequence is returned
*/
vector<int> genCollatzSequence(int intValue);

/*
Preconditions: Output stream is not in an error state
Postconditions: Converted value is returned if valid or program is terminated
*/
int promptForNumber();

int main()
{
bool blnContinue = true; //Loop control variable
do
{
while(cin.fail()) //Purge stream if needed
{
cin.clear();
string strJunk = "";
getline(cin, strJunk);
}
cout << "a) Lucas Sequence" << endl
<< "b) Validate binary string" << endl
<< "c) Test for positive and even" << endl
<< "d) (Bonus) Generate Collatz sequence" << endl
<< "e) Quit" << endl
<< "Enter selection: ";
char chChoice = '\0'; //Capture menu option
cin >> chChoice;
//Actual parameters for functions
string strBinaryNumber = "";
int intValue = 0;
bool blnPositive = false;
bool blnEven = false;
//Variable to hold return values
vector<int> vecSequence;
switch(chChoice) //Menu selection
{
case 'a':
case 'A':
intValue = promptForNumber(); //Prompt user
genLucasSequence(intValue); //Generate sequence
break;
case 'b':
case 'B':
cout << "Enter binary string: ";
getline(cin, strBinaryNumber); //Prompt user
if(isValidBinaryString(strBinaryNumber)) //Output based on result
cout << endl << "Number is a binary string" <<endl;
else
cout << endl << "Number is not a binary string" << endl;
break;
case 'c':
case 'C':
intValue = promptForNumber();
isPositiveAndEven(intValue, blnPositive, blnEven); //Pass by reference
if(blnPositive) //Output based on result
cout << "Number is positive" <<endl;
else
cout << "Number is not positive" << endl;
if(blnEven)
cout << "Number is even" <<endl;
else
cout << "Number is odd" << endl;
break;
case 'd':
case 'D':
{
intValue = promptForNumber(); //Prompt user
vecSequence = genCollatzSequence(intValue); //Generate sequence
cout << "Collatz Sequence: ";
for(int k = 0; k < vecSequence.size(); k++)
cout << vecSequence[k] << endl;
}
break;
case 'e':
case 'E':
blnContinue = false; //Quit by ending main loop
break;
default: //Inform user of invalid option being selected
cerr << "Invalid option, try again" << endl;
}

} while(blnContinue); //End of menu loop
return 0;
}

//An example of a value returning function implementation
int promptForNumber()
{
int intValue = 0;
cout << "Enter number: ";
cin >> intValue;
if(cin.fail())
{
cerr << "Invalid conversion" << endl;
exit(ERROR_CONVERSION);
}
return intValue;
}

//EndProvided

//--Edit after this point.
//Your code for the function implementations goes here
void genLucasSequence(int intTerms)
{
int a = -1;
int b = 2;
intTerms = 0;
cout << "Enter the number of terms" << endl;
cin >> intTerms;

for (int i=1; i<=intTerms; i=i+1)
{
int c = a;
a = b;
b = c + b;
}
cout << b << endl;
}

bool isValidBinaryString(string strNumber);
{ // this is where my error is.
strNumber = " ";
{
if(strNumber = "0") | (strNumber = "1")
return (strNumber true)
else
return (strNumber false)
}
}


void isPositiveAndEven(int intValue, bool& blnPositive, bool& blnEven);
{
intValue = 0;
cout << "Enter a number" << endl;
cin >> intValue;

blnPositive = intValue > 0;
blnEven = intValue / 2;

}

vector<int> genCollatzSequence(int intValue);
{
vector<int>vecSequence
vecSequence.push_back(intValue);
while(intValue>1)
{
if (intValue%2==0);
intValue = intValue / 2
else
intValue = intValue*3+1;
vecSequence.push_back(intValue);
}
return vecSequence;
}

bool OptionE(bool blnContinue)
{
return (blnContinue false)
}

[donbock]

Remove the semicolon from the line immediately above the comment "this is where my error is". The semicolon makes that line a function declaration (that is, a function prototype), but you want a function definition. This same mistake occurs at least twice more in subsequent lines .

[RKVP123]

i am getting the same error

[donbock]

There weren't any changes in the error message or associated line number?

Starting from your "this is where my error is" comment and focusing on syntax issues...

1. Next line. I'm not familiar with C++ string type, but this line looks like what I would expect to be ok.
2. Next line. This open brace is legal, but it doesn't do anything useful.
3. Next line. Change each = into == then change | into || finally enclose entire condition in parentheses.
4. Next line. I don't understand what (strNumber true) means, but even if that is ok, need to terminate this line with a semicolon.
5. Next line. Ok
6. Next line. I don't understand what (strNumber false) means, but even if that is ok, need to terminate this line with a semicolon.

By the way, it would be a lot easier to refer to specific lines in your program if you enclosed the entire block of code in [CODE/] tags.