Compilare: user.cpp: In function ‘void Scanf(int&)’: user.cpp:19:26: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] for(;'0'<=buffer[pz] && buffer[pz] <= '9' || buffer[pz] == '-';next){ ^ user.cpp:18:5: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] for(;(buffer[pz] < '0' || buffer[pz] > '9') && buffer[pz] != '-'; next); ^ user.cpp:19:5: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] for(;'0'<=buffer[pz] && buffer[pz] <= '9' || buffer[pz] == '-';next){ ^ user.cpp: In function ‘int main()’: user.cpp:78:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("treemis.in","r",stdin); ^ user.cpp:79:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("treemis.out","w",stdout); ^