Compilare: user.cpp: In function ‘int main()’: user.cpp:28:24: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] Xbin[++lenxbin]=NULL; ^ user.cpp:36:24: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] Ybin[++lenybin]=NULL; ^ user.cpp: In function ‘void divide(char*, int*, int)’: user.cpp:75:15: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] num[1]=NULL; ^ user.cpp: In function ‘int main()’: user.cpp:15:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&Q); ^ user.cpp:18:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s%s",X,Y); ^