Compilare: user.cpp: In function ‘int main()’: user.cpp:83:10: warning: unused variable ‘v’ [-Wunused-variable] int u, v, i; ^ user.cpp: In function ‘char getChar(FILE*)’: user.cpp:27:30: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(in, 1, MAX_BUFF, f); ^ user.cpp: In function ‘int main()’: user.cpp:107:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lca.out", "w", stdout); ^