c++ - 编译错误 : Undeclared member that is actually declared

Question

除了三个补充成员函数外，我创建了一个可以正常工作的类。在所有其他公共(public)成员函数中，我指的是私有(private)数据成员，并且我可以轻松访问我需要的数据；但是，对于这三个特定函数，Dev C++ 编译器会响应:“'matrix' undeclared, first use this function (matrix is the private data member.)问题 child 。

bool boolMatrix::get(int row, int col) const{
    assert (row < ROW_SIZE  && col < COL_SIZE);     

    if(matrix[row][col]){
        return true;
    }
    else 
        return false;
}


int rowCount(int row){
    int trueCount = 0;
    assert(row < ROW_SIZE);
    for (int colCount = 0; colCount < COL_SIZE; colCount++){
        if(matrix[row][colCount]){
            trueCount++;
        }
    }

    return trueCount;
}



int colCount(int col){
    int trueCount = 0;
    assert(col < COL_SIZE);

    for (int rowCount = 0; rowCount < ROW_SIZE; rowCount++){
        if(matrix[rowCount][col]){
            trueCount++;
        }
    }

    return trueCount;
}



int totalCount(){
    int trueCount = 0;
    for (int rowCount = 0; rowCount < ROW_SIZE; rowCount++){ 
        for (int colCount = 0; colCount < COL_SIZE; colCount++){
            if (matrix[rowCount][colCount]){
                trueCount++;
            }
        }
    }

    return trueCount;
} 

Answer 1

将 "boolMatrix::"添加到 totalCount() 和 colCount(int col)