Compilare: user.cpp: In function ‘int q2(int, int)’: user.cpp:67:14: warning: unused variable ‘gr’ [-Wunused-variable] int ant, gr, ga, gb, sum, med; ^ user.cpp:67:18: warning: unused variable ‘ga’ [-Wunused-variable] int ant, gr, ga, gb, sum, med; ^ user.cpp:67:22: warning: unused variable ‘gb’ [-Wunused-variable] int ant, gr, ga, gb, sum, med; ^ user.cpp: In function ‘char nextch()’: user.cpp:18:36: 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, BMAX, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:85:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qvect.in", "r", stdin); ^ user.cpp:86:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qvect.out", "w", stdout); ^