driver cpp driver program to demonstrate the behavior of the Triangle class MAIN Driver include iostream include iomanip include triangle h using namespace std int main set decimal outputs to 2 decimal places cout setiosflags ios fixed ios showpoint setprecision 2 create some Triangles Triangle t1 5 t2 7 t3 12 X O t4 50 o display original Triangles cout t1 has size t1 GetSize units n t1 Draw cout nt2 has size t2 GetSize units n t2 Draw cout nt3 has size t3 GetSize units n t3 Draw cout nt4 has size t4 GetSize units n t4 Draw cout n t1 Shrink demonstrate shrink t2 Shrink t3 Grow and grow t4 Grow cout t1 now has size t1 GetSize units n cout t2 now has size t2 GetSize units n cout t3 now has size t3 GetSize units n cout t4 now has size t4 GetSize units n demonstrate perimeter cout t2 has perimeter t2 Perimeter units n cout t3 has perimeter t3 Perimeter units n and area cout t2 has area t2 Area square units n n cout t3 has area t3 Area square units n n t1 Draw t1 Grow show that fill character cout t1 grows n appears only when size t1 Draw is at least 3 t1 Grow cout and grows n t1 Draw cout n t1 t2 demonstrate the default overload of the assignment operator cout t1 now has size t1 GetSize units n t1 Draw demonstrate the changing of border and fill characters t2 SetBorder t2 SetFill cout t2 now looks like n t2 Draw cout n t2 SetBorder n illegal border t2 SetFill a illegal fill cout t2 now looks like n t2 Draw cout n cout nHere is a summary on t3 n demonstrate summary t3 Summary return 0 END MAIN CPP triangle cpp file include iostream include cmath include iomanip include triangle h using namespace std default constructor Triangle Triangle int l char b char f if l 1 length 1 else if l 39 length 39 else length l SetBorder b SetFill f int Triangle GetSize return length void Triangle SetBorder char b if validChar b border b else border return void Triangle SetFill char f if validChar f fill f else fill return bool Triangle validChar char c int intVal static cast int c if intVal 33 intVal 126 return false return true else int Triangle Perimeter return 3 length returns length of all sides double Triangle Area cout fixed setprecision 2 double A pow length 2 static cast double sqrt 3 4 return A void Triangle Draw if length 1 cout border return else if length 2 cout border endl cout border border if length 2 for int i 1 i length i for int j 0 j length i j cout cout border cout fill for int j 0 j i j if j 1 i length else if i length j length 2 cout cout border if i 1 cout endl cout border void Triangle Grow if length 39 length void Triangle Shrink if length 0 length void Triangle Summary return return return return header file for triangle class Triangle public private int length char border char fill cout Size of triangle s side GetSize units n cout Perimeter of triangle Perimeter units n cout Area of triangle Area units n cout Triangle looks like endl Draw END CPP H Triangle int l char b char f int GetSize int Perimeter double Area void Draw void Grow void Shrink void SetBorder char void SetFill char void Summary bool validChar char returns size of a side returns the perimeter returns the area displays triangle increases size of triangle by 1 decreases size of triangle by 1 mutator mutator output summary END H