Compilare: user.cpp: In function ‘int main()’: user.cpp:29:9: warning: unused variable ‘mn1’ [-Wunused-variable] int mn1=1,mn2=0,mx2=0,mx1=-1; ^ user.cpp:29:15: warning: unused variable ‘mn2’ [-Wunused-variable] int mn1=1,mn2=0,mx2=0,mx1=-1; ^ user.cpp:29:21: warning: unused variable ‘mx2’ [-Wunused-variable] int mn1=1,mn2=0,mx2=0,mx1=-1; ^ user.cpp:29:27: warning: unused variable ‘mx1’ [-Wunused-variable] int mn1=1,mn2=0,mx2=0,mx1=-1; ^ user.cpp:16:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:20:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^