Compilare: user.cpp: In function ‘int main()’: user.cpp:43:6: warning: unused variable ‘min’ [-Wunused-variable] int min=1; ^ user.cpp:39:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:47:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&x,&y1,&y2); ^