In file included from main.cpp:8:0:
num.cpp: In member function 'Num Num::operator+(const Num&)':
num.cpp:17:26: error: qualified-id in declaration before '(' token
 inline Num Num::operator-(const Num& other) {
                          ^
num.cpp:21:26: error: qualified-id in declaration before '(' token
 inline Num Num::operator*(const Num& other) {
                          ^
num.cpp:25:26: error: qualified-id in declaration before '(' token
 inline Num Num::operator+(int num) {
                          ^
num.cpp:29:26: error: qualified-id in declaration before '(' token
 inline Num Num::operator-(int num) {
                          ^
num.cpp:33:26: error: qualified-id in declaration before '(' token
 inline Num Num::operator*(int num) {
                          ^
num.cpp:37:28: error: qualified-id in declaration before '(' token
 inline Num& Num::operator+=(const Num& other) {
                            ^
num.cpp:37:29: error: expected primary-expression before 'const'
 inline Num& Num::operator+=(const Num& other) {
                             ^~~~~
num.cpp:41:28: error: qualified-id in declaration before '(' token
 inline Num& Num::operator-=(const Num& other) {
                            ^
num.cpp:41:29: error: expected primary-expression before 'const'
 inline Num& Num::operator-=(const Num& other) {
                             ^~~~~
num.cpp:45:28: error: qualified-id in declaration before '(' token
 inline Num& Num::operator*=(const Num& other) {
                            ^
num.cpp:45:29: error: expected primary-expression before 'const'
 inline Num& Num::operator*=(const Num& other) {
                             ^~~~~
num.cpp:49:28: error: qualified-id in declaration before '(' token
 inline Num& Num::operator+=(int num) {
                            ^
num.cpp:49:29: error: expected primary-expression before 'int'
 inline Num& Num::operator+=(int num) {
                             ^~~
num.cpp:53:28: error: qualified-id in declaration before '(' token
 inline Num& Num::operator-=(int num) {
                            ^
num.cpp:53:29: error: expected primary-expression before 'int'
 inline Num& Num::operator-=(int num) {
                             ^~~
num.cpp:57:28: error: qualified-id in declaration before '(' token
 inline Num& Num::operator*=(int num) {
                            ^
num.cpp:57:29: error: expected primary-expression before 'int'
 inline Num& Num::operator*=(int num) {
                             ^~~
num.cpp:61:28: error: qualified-id in declaration before '(' token
 inline Num& Num::operator*=(int num) {
                            ^
num.cpp:61:29: error: expected primary-expression before 'int'
 inline Num& Num::operator*=(int num) {
                             ^~~
main.cpp:12:49: error: a function-definition is not allowed here before '{' token
 void stress_test(int modulo, int st, int bound) {
                                                 ^
main.cpp:32:12: error: a function-definition is not allowed here before '{' token
 int main() {
            ^
main.cpp:174:1: error: expected '}' at end of input
 }
 ^