davidberard98 · July 6, 2022 00:35
diff --git a/build.sh b/build.sh
 g++ counter.cpp -c -o counter.o
 g++ x.cpp -c -o x.o
 g++ x.cpp -c -o y.o
 g++ main.cpp -c -o main.o
 g++ counter.o x.o y.o main.o -o main
diff --git a/counter.cpp b/counter.cpp
 #include "counter.h"

 int& counter() {
  static int cnt = 0;
  return cnt;
 }

 CounterIncr::CounterIncr() {
  counter() += 1;
 }
diff --git a/counter.h b/counter.h
 int& counter();
 struct CounterIncr {
  CounterIncr();
 };
diff --git a/main.cpp b/main.cpp
 #include <iostream>
 #include "counter.h"

 int main() {
  std::cout << "Counter: " << counter() << std::endl;
  return 0;
 }
diff --git a/x.cpp b/x.cpp
 #include <iostream>
 #include "counter.h"

 namespace {
 CounterIncr ci;
 }
	#include <iostream>
	#include "counter.h"

	int main() {
	std::cout << "Counter: " << counter() << std::endl;
	return 0;
	}