Compilare: main.cpp: In member function 'S S::inc()': main.cpp:26:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In member function 'S S::operator>>(int&)': main.cpp:33:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:40:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.in", "r", stdin); ^ main.cpp:41:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.out", "w", stdout); ^ main.cpp: In member function 'S S::inc()': main.cpp:21:40: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(b, 1, mxb + 1, stdin); ^