Compilare: user.cpp: In function ‘void putnr(short int)’: user.cpp:22:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[nr++]=n%10+'0'; ^ user.cpp:27:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] putch(v[nr]); ^ user.cpp: In function ‘int main()’: user.cpp:38:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%hd", &n); ^