Problem in boolean function

**Luis-Fernando** · 08-02-2010

Hi friends,
I am new to this forum. I recently started learning c++ language. I have written following program in c++, but I get problem in in boolean function. I don't know what is the reason of error. Please help me.

Code:

using namespace std;


bool checkValue(int, int, int);


int main()
{
   
        int iNumber[20];
        int a = 0;
        int k = 0;
        
                for (int k=0; k<20;) {
                        cout << "Enter 20 integers between 10 and 100: ";
                        cin >> a;
                                if ((a>=10) && (a<=100)){      
                                        checkValue(a,iNumber[k], k);   
                                        if (checkValue=false) {
                                                iNumber[k]=x;  
                                                n++;    
                                        }
                                        else if (checkValue=true) {
                                        cout << "Invalid Number!" << endl;      
                                        }
                                }
                }
     
                cout << endl;
                for (int k=0; k<20;){
                        cout << "The non-duplicate values are:" <<  iNumber[k] << endl;
                        k++; 
                }
        return 0;
}      


bool checkValue(int x, int iNumber[n], int n) {

   for (int i=0; i<n; i++) {
      if (x == iNumber[n]) {
                  cout << "Duplicate Number!" << endl;  
                  return true;
          }
          else {
                return false;
          }
}       //end of checkValue function

**absolute55** · 08-02-2010

Hey you have make some silly mistake in your code and that's why you are getting such type of problem. In this case you have written following code in your program to fix this problem.

Code:

for (int k=0; k<n; k++) {
      if (y == iNumber[z]) {
                  cout << "another number" << endl;  
                  return true;
          }
          else {
                return false;
          }
}

After this use == for comparison and you also have to use () for call a function.

Code:

bool Functions(void);

if(Functions() == true) {

**Reegan** · 08-02-2010

You have made two wrong mistake in your code and that's why you are getting such type of problem. In this case you have to following code in your program to get rid out of this problem. First create one variable known as "checkValues" and assign true value as following.

Code:

if (checkValues=true) {

If above condition failed then you can use following code.

Code:

if (checkValues==false) {

**opaper** · 08-02-2010

You have assign same value for two different variable and that's why you are getting such type of error message. Instead of assigning any value you have to use Boolean variable without any value like below

Code:

if(checkValue){

But there is one problem. Boolean value must return any value and for this you have to call function without assigning a value to it.

**MindSpace** · 08-02-2010

You have written wrong code and that's why you are getting such type of error message. In this case you have to use following code in your program to fix this problem.

Code:

bool checkValue(int k, int iNumber[], int n) 
{
    for (int a=0; a<s; i++)
    {
        if (k == iNumbers[z])
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}