Compilare: user.cpp: In function ‘void gr2()’: user.cpp:32:9: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] int a,b,c,d,j,semn=1,n; ^ user.cpp:32:11: warning: variable ‘b’ set but not used [-Wunused-but-set-variable] int a,b,c,d,j,semn=1,n; ^ user.cpp:32:13: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] int a,b,c,d,j,semn=1,n; ^ user.cpp:32:15: warning: unused variable ‘d’ [-Wunused-variable] int a,b,c,d,j,semn=1,n; ^ user.cpp:33:11: warning: unused variable ‘q’ [-Wunused-variable] float q,r1,r2; ^ user.cpp:33:13: warning: unused variable ‘r1’ [-Wunused-variable] float q,r1,r2; ^ user.cpp:33:16: warning: unused variable ‘r2’ [-Wunused-variable] float q,r1,r2; ^ user.cpp: In function ‘int gr1()’: user.cpp:27:13: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] c=x*semn; ^ user.cpp:28:9: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] x=(c-b)/a; ^ user.cpp:28:14: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] x=(c-b)/a; ^