Compilare: user.cpp: In function ‘bool fand()’: user.cpp:123:9: warning: unused variable ‘t’ [-Wunused-variable] int t; ^ user.cpp: In function ‘bool expresie()’: user.cpp:135:9: warning: unused variable ‘t’ [-Wunused-variable] int t; ^ user.cpp: In function ‘int main()’: user.cpp:146:13: warning: unused variable ‘a’ [-Wunused-variable] int n,i,a=0; ^