Compilare: user.cpp: In function ‘int get(int&)’: user.cpp:33:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp:22:69: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, DIMBUF, stdin), p = 0, len = strlen(buff); ^ user.cpp:30:70: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, DIMBUF, stdin), p = 0 , len = strlen(buff); ^ user.cpp: In function ‘int main()’: user.cpp:141:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("smax.in", "r", stdin); ^ user.cpp:142:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("smax.out", "w", stdout); ^ user.cpp:143:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, DIMBUF, stdin); ^