在Xcode IDE中初始化我自己的c++类向量

我目前遇到的问题如下:

我试图在我的main.cpp文件中构造一个只包含SingleBox对象的向量(SingleBox是我定义的一个类)，然而，当我试图填充或调整该向量的大小时，向量从不包含任何SingleBox对象，并且下面尝试填充或调整向量大小的代码从未在我的main.cpp文件中执行。

提前向任何提供帮助解决此问题的人表示感谢。

文件main.cpp

#include <iostream>
#include "SingleBox.h"
#include "NineBox.h"
int main( int argc, const char * argv[] )
{
    std::vector< SingleBox > vec;
    std::cout << "Below is the attempt to populate: n";
    vec.push_back( SingleBox( 0, 0 ) );
    std::cout << "Nothing from this point onward executes...n";
    std::cout << "The size: " << vec.size() << std::endl;
    return 0;
}

文件SingleBox.h

#ifndef __Sudoku_Solver__SingleBox__
#define __Sudoku_Solver__SingleBox__
#include <iostream>
#include <vector>
// SingleBox class definition
class SingleBox
{
public:
    SingleBox( int nineBoxNum, int boxValue ); // constructor
    void updatePoss( int number );             // function to remove disproven possibilities
    // get functions
    bool isComplete(  );                       // function to get the completion indicator
    int getBoxValue(  );                       // function to get the boxValue
    // debugging functions
    void debugPrinter(   );
private:
    bool completionStatus;                     // if the value of the SingleBox is non-zero
    int nineBoxNumber;                         // the NineBox to which the SingleBox belongs
    int boxValue;                              // the value of the SingleBox
    std::vector< int > possibilities;          // possible values for the SingleBox
    // set functions
    void setNineBoxNum( int nineBoxNum );      // function to set the NineBox number
    void setBoxValue( int boxVal );            // function to set the boxValue
    void setIndicator( bool isComplete );      // function to set the completion indicator
};
#endif /* defined(__Sudoku_Solver__SingleBox__) */

文件SingleBox.cpp

#include "SingleBox.h"
// SingleBox constructor initializes each data member
SingleBox::SingleBox( int nineBoxNum, int boxVal )
{
    setNineBoxNum( nineBoxNum );
    setBoxValue( boxVal );
    setIndicator( false );
    possibilities = {1, 2, 3, 4, 5, 6, 7, 8, 9};
} // end SingleBox constructor
// set new NineBox number
void SingleBox::setNineBoxNum( int nineBoxNum )
{
    nineBoxNumber = nineBoxNum;
} // end function setNineBoxNum
// set new BoxValue number
void SingleBox::setBoxValue( int boxVal )
{
    boxValue = boxVal;
} // end function setBoxValue
// set new completion indicator
void SingleBox::setIndicator( bool isComplete )
{
    completionStatus = isComplete;
} // end function setIndicator
// return the status indicator
bool SingleBox::isComplete(  )
{
     return completionStatus;
}
// return the BoxValue
int SingleBox::getBoxValue(  )
{
    return boxValue;
} // end function getBoxValue
// set value to zero if in possibilities vector
void SingleBox::updatePoss( int number )
{
    int zeroCnt = 0;
    int value = 0;
    for ( int i = 0; i < possibilities.size(); i++ ) {
        if ( possibilities[ i ] == number ) {
            possibilities[ i ] = 0;
            break;
        }
    }
    for ( int j = 0; j < possibilities.size(); j++ ) {
        if ( possibilities[ j ] == 0 ) {
            zeroCnt++;
        }
        else {
            value = possibilities[ j ];
        }
    }
    if ( zeroCnt == possibilities.size() - 1 ) {
        boxValue = value;
        setIndicator( true );
    }
} // end function updateProbs
// print all data members of the class to the console
void SingleBox::debugPrinter(  )
{
    std::cout << std::endl;
    std::cout << "SingleBox class contains the following n";
    std::cout << " - Completion status = " << completionStatus << std::endl;
    std::cout << " - NineBoxNumber     = " << nineBoxNumber << std::endl;
    std::cout << " - BoxValue          = " << boxValue << std::endl;
    std::cout << " - Possibilities     = [";
    for (int i = 0; i < possibilities.size(); i++) {
        std::cout << possibilities[i];
        if (i != possibilities.size() - 1) {
            std::cout << ", ";
        }
    }
    std::cout << "]n" << std::endl;
} // end function debugPrinter