Compilare: user.cpp: In function ‘int get_nr()’: user.cpp:18:21: warning: suggest parentheses around comparison in operand of ‘|’ [-Wparentheses] while(buffer[i] < 48 | buffer[i] > 57) ^ user.cpp:22:21: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(buffer[i] > 47 & buffer[i] < 58) ^ user.cpp: In function ‘int main()’: user.cpp:58:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i != v[h].size(); ++i) ^ user.cpp:34:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in", "r", stdin); ^ user.cpp:35:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out", "w", stdout); ^ user.cpp: In function ‘int get_nr()’: user.cpp:20:69: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++i == buffSize) fread(buffer, 1, buffSize, stdin), i = 0; ^ user.cpp:26:69: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++i == buffSize) fread(buffer, 1, buffSize, stdin), i = 0; ^