Qt Code: 
  1. if (a != b) {
  2.     cout << "if" << endl;
  3.     if (c != 0 && a_vec[c-1] == b) {
  4.  
  5.         cout << "a is not longer equal to b" << endl;
  6.  
  7.     }
  8.  
  9. }
  10.  
  11. else if (c == 0 || a_vec[c-1] != b) {
  12.  
  13.     cout << "a is now equal to b" << endl;
  14.  
  15. }
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what happens?