In file included from main.cpp:7:0:
num.cpp:3:30: error: default argument given for parameter 1 of 'Num::Num(int, int)' [-fpermissive]
 Num::Num(int a = 0, int b = 0) {
                              ^
In file included from main.cpp:6:0:
num.h:7:5: note: previous specification in 'Num::Num(int, int)' here
     Num(int value=0, int modulo=0);
     ^~~
In file included from main.cpp:7:0:
num.cpp:3:30: error: default argument given for parameter 2 of 'Num::Num(int, int)' [-fpermissive]
 Num::Num(int a = 0, int b = 0) {
                              ^
In file included from main.cpp:6:0:
num.h:7:5: note: previous specification in 'Num::Num(int, int)' here
     Num(int value=0, int modulo=0);
     ^~~