Compilare: user.cpp: In function ‘int cautbin1(int)’: user.cpp:8:21: warning: unused variable ‘i’ [-Wunused-variable] int l=1,r=n,mid,i,sol=0; ^ user.cpp: In function ‘int cautbin2(int)’: user.cpp:27:21: warning: unused variable ‘i’ [-Wunused-variable] int l=1,r=n,mid,i,sol; ^ user.cpp: In function ‘int cautbin3(int)’: user.cpp:43:21: warning: unused variable ‘i’ [-Wunused-variable] int l=1,r=n,mid,i,sol; ^ user.cpp: In function ‘int cautbin2(int)’: user.cpp:39:12: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] return sol; ^ user.cpp: In function ‘int cautbin3(int)’: user.cpp:55:12: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] return sol; ^ user.cpp: In function ‘int main()’: user.cpp:72:29: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<cautbin3(x)<<'\n'; ^ user.cpp:70:29: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<cautbin2(x)<<'\n'; ^