Compilare: user.cpp: In function ‘int main()’: user.cpp:82:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { ^ user.cpp:89:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { ^ user.cpp:104:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { ^ user.cpp: In function ‘int GetInt()’: user.cpp:24:55: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] } ^ user.cpp:32:55: 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:57:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] ofstream g("mexc.out"); ^ user.cpp:60:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] ^