Compilare: user.cpp: In function ‘int main()’: user.cpp:80:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { ^ user.cpp:87:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { ^ user.cpp:102:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { ^ user.cpp: In function ‘int GetInt()’: user.cpp:22:55: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] } ^ user.cpp:30:55: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] } ^ user.cpp: In function ‘int main()’: user.cpp:55:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mexc.out", "w", stdout); ^ user.cpp:56:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] ^ user.cpp:58:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] ^