Compilare: main.cpp: In member function 'long double Rectangle::perimeter()': main.cpp:184:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void extend(int&, int&, long double)': main.cpp:205:16: warning: unused variable 'aux' [-Wunused-variable] int ok = 1,aux; ^~~ main.cpp: In function 'int main()': main.cpp:244:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<p.size();i++){ ~^~~~~~~~~ main.cpp:216:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.in","r",stdin); ^ main.cpp:217:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.out","w",stdout); ^ main.cpp:219:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:222:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^