/in/exam3_matrix.cpp:5:1: error: prototype for 'intMatrix::intMatrix()' does not match any in class 'intMatrix'
 intMatrix::intMatrix() {
 ^~~~~~~~~
In file included from /in/exam3_matrix.cpp:3:0:
/in/compile/exam3_matrix.h:27:2: error: candidates are: intMatrix::intMatrix(int, int, int)
  intMatrix(int r = 1 , int c = 1, int initialValue = 1); //TODO: Complete this construstor. 7Pts.
  ^~~~~~~~~
/in/compile/exam3_matrix.h:23:2: error:                 intMatrix::intMatrix(const intMatrix&)
  intMatrix(const intMatrix & that) {
  ^~~~~~~~~
/in/exam3_matrix.cpp: In member function 'void intMatrix::fillFrom(std::vector<int>&)':
/in/exam3_matrix.cpp:31:44: error: unused parameter 'source' [-Werror=unused-parameter]
 void intMatrix::fillFrom(std::vector<int> &source){
                                            ^~~~~~
/in/exam3_matrix.cpp: In member function 'void intMatrix::saveTo(std::__cxx11::string)':
/in/exam3_matrix.cpp:39:36: error: unused parameter 'fileName' [-Werror=unused-parameter]
 void intMatrix::saveTo(std::string fileName){
                                    ^~~~~~~~
cc1plus: all warnings being treated as errors