Compilare: user.cpp: In function ‘void Solve()’: user.cpp:137:17: warning: unused variable ‘dd’ [-Wunused-variable] int dd=delta; ^ user.cpp:20:35: warning: variable ‘d’ set but not used [-Wunused-but-set-variable] double x=0,tot=0,tot1=0,a,b,c,d; ^ user.cpp: In function ‘void Read()’: user.cpp:133:32: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] double delta=(b*b)-(4*a*c); ^ user.cpp:20:33: note: ‘c’ was declared here double x=0,tot=0,tot1=0,a,b,c,d; ^ user.cpp:133:30: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] double delta=(b*b)-(4*a*c); ^ user.cpp:20:29: note: ‘a’ was declared here double x=0,tot=0,tot1=0,a,b,c,d; ^ user.cpp:133:24: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] double delta=(b*b)-(4*a*c); ^ user.cpp:20:31: note: ‘b’ was declared here double x=0,tot=0,tot1=0,a,b,c,d; ^