Compilare: main.cpp: In function 'int main()': main.cpp:20:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghi2.in", "r", stdin); ^ main.cpp:21:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghi2.out", "w", stdout); ^ main.cpp:47:67: warning: 'maxY' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << fixed << setprecision(3) << abs(maxX - minX) * abs(maxY - minY) << "\n"; ~~~^~~~~~~~~~~~~ main.cpp:47:48: warning: 'maxX' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << fixed << setprecision(3) << abs(maxX - minX) * abs(maxY - minY) << "\n"; ~~~^~~~~~~~~~~~~ main.cpp:47:67: warning: 'minY' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << fixed << setprecision(3) << abs(maxX - minX) * abs(maxY - minY) << "\n"; ~~~^~~~~~~~~~~~~ main.cpp:47:48: warning: 'minX' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << fixed << setprecision(3) << abs(maxX - minX) * abs(maxY - minY) << "\n"; ~~~^~~~~~~~~~~~~