Compilare: user.cpp: In function ‘void cit(int&)’: user.cpp:20: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:21: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:22: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void update(int, int, int, int, int, int)’: user.cpp:46: warning: suggest parentheses around ‘+’ inside ‘>>’ user.cpp: In function ‘void query(int, int, int, int, int, int*)’: user.cpp:63: warning: suggest parentheses around ‘+’ inside ‘>>’ user.cpp: In function ‘int main()’: user.cpp:75: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:76: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result