Compilare: main.cpp: In function 'void read(ui&)': main.cpp:29:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation] while(c < '0')c = getchar(); x = c^48; ^~~~~ main.cpp:29:34: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while' while(c < '0')c = getchar(); x = c^48; ^ main.cpp: In function 'int main()': main.cpp:14:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.out","w",stdout); ^ main.cpp:15:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.in","r",stdin); ^