Compilare: main.cpp: In function 'char readChar()': main.cpp:16:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread( rbuf, 1, BUFSIZE, stdin ); ^ main.cpp: In function 'int main()': main.cpp:80:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tnia.in", "r", stdin); ^ main.cpp:81:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tnia.out", "w", stdout); ^ main.cpp: In function 'long long int bin(long long int)': main.cpp:65:25: warning: 'rez' may be used uninitialized in this function [-Wmaybe-uninitialized] long long st=a, dr=b, rez, mij; ^~~ main.cpp: In function 'int main()': main.cpp:65:25: warning: 'rez' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:65:25: warning: 'rez' may be used uninitialized in this function [-Wmaybe-uninitialized]