Compilare: user.cpp: In function ‘int main()’: user.cpp:129:12: warning: unused variable ‘st’ [-Wunused-variable] double st = max, dr = sum / 2; ^~ user.cpp:129:22: warning: unused variable ‘dr’ [-Wunused-variable] double st = max, dr = sum / 2; ^~ user.cpp: In function ‘char nextch()’: user.cpp:11:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fi); ^