运行 ID: 7221

Main.cc: In function ‘int main()’:
Main.cc:7:42: error: ‘by’ was not declared in this scope
     cout << fixed << setprecision(2) << (by-ax)/(b-a);
                                          ^~
Main.cc:7:42: note: suggested alternative: ‘y’
     cout << fixed << setprecision(2) << (by-ax)/(b-a);
                                          ^~
                                          y
Main.cc:7:45: error: ‘ax’ was not declared in this scope
     cout << fixed << setprecision(2) << (by-ax)/(b-a);
                                             ^~
Main.cc:7:45: note: suggested alternative: ‘x’
     cout << fixed << setprecision(2) << (by-ax)/(b-a);
                                             ^~
                                             x