Compilare: user.cpp: In function ‘int c1(int)’: user.cpp:9:9: warning: unused variable ‘i’ [-Wunused-variable] int i,p,u,mij; ^ user.cpp: In function ‘int c2(int)’: user.cpp:30:9: warning: unused variable ‘i’ [-Wunused-variable] int i,p,u,mij; ^ user.cpp: In function ‘int c3(int)’: user.cpp:49:9: warning: unused variable ‘i’ [-Wunused-variable] int i,p,u,mij; ^ user.cpp: In function ‘int main()’: user.cpp:69:10: warning: unused variable ‘sem’ [-Wunused-variable] bool sem; ^