Create Matrix-A.cpp

https://godbolt.org/z/PdW9KdKEP
Adttil · Dec 7, 2023 · 411c1f3 · 411c1f3
1 parent a307c8c
commit 411c1f3
Showing 1 changed file with 22 additions and 0 deletions.
diff --git a/src/群友提交/第14题/Matrix-A.cpp b/src/群友提交/第14题/Matrix-A.cpp
@@ -0,0 +1,22 @@
+#include<iostream>
+#include<cstdint>
+
+namespace ss {
+    int a = 0;
+}
+
+#if defined(_MSC_VER)
+#define MAIN_ATTRIBUTES __pragma(optimize("", off))
+#elif defined(__clang__)
+#define MAIN_ATTRIBUTES [[clang::optnone]]
+#else
+#define MAIN_ATTRIBUTES [[gnu::optimize(0)]]
+#endif
+
+int b = 0;
+MAIN_ATTRIBUTES
+int main() {
+    *(int*)((uint8_t*)&b - sizeof(int)) = 100;
+    *(int*)((uint8_t*)&b + sizeof(int)) = 100;
+    std::cout << ss::a << '\n';
+}