I am writing a program that asks a user for a difficulty level then gives them multiplication questions while counting the correct answers. My issue is my counter ( numCorrect
) updates for false answers too and I can't understand why. Can someone tell me why?
int main()
{
int n; //difficulty level
int a, b, atimesb; // random generated numbers and multiplication
string name;
int numCorrect=0; // initilize counter to 0
int numAsked=0; // initilize counter to 0
int exitCond = 1; // loop condition continue
cout << "this program tests your multiplication skills!" << endl;
cout << "what is your name?" << endl;
getline(cin, name);
cout << " Enter a difficulty level" << endl;
cin >> n; // user input for difficulty level
while (exitCond != 0) // loop to continue asking until user ends with 0
{
MakeQuestion(n, a, b, atimesb); // calls function to make a question
UserAnswerIsCorrect(a, b, atimesb); // calls function to ask question and evaluate it
if (UserAnswerIsCorrect) // update if correct
{
numCorrect++;
}
numAsked++; // update total questions
cout << " Enter 0 to quit, 1 to go again" << endl;
cin >> exitCond; // user input for difficulty level
}
PrintScore(numCorrect, numAsked); // calls function to print score
return 0;
}
int NewRandomNumber(int n)
{
int val;
val = rand() % n + 2; // creates a number between 2 and n
return val;
}
void MakeQuestion(int n, int& a, int& b, int& atimesb)
{
a = NewRandomNumber(n);
b = NewRandomNumber(n);
atimesb = a*b;
return;
}
bool UserAnswerIsCorrect(int a, int b, int atimesb)
{
int userAns;
cout << a << "X" << b << "=" << endl;
cin >> userAns;
if (userAns == atimesb)
{
cout << "Correct!";
return true;
}
else
{
cout << "false, correct answer is:" << atimesb << endl;
return false;
}
}
void PrintScore(int numCorrect, int numAsked)
{
cout << "your score is: " << numCorrect << "/" << numAsked << " or " <<
(numCorrect / numAsked) * 100 << "%" << endl;
return;
}
UserAnswerIsCorrect(a, b, atimesb); // calls function to ask question and evaluate it
if (UserAnswerIsCorrect) // update if correct
{
numCorrect++;
}
should be
if (UserAnswerIsCorrect(a, b, atimesb)) // update if correct
{
numCorrect++;
}
You ignored the return value of UserAnswerIsCorrect
in your code.
You can do this
bool corr;
corr = UserAnswerIsCorrect( a, b, atimesb);
if(corr) {
numCorrect++;
}
Although it just happened because you was ignoring the return value.
try this condition
if(UserAnswerIsCorrect == true){
....
}
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