Compilare: main.cpp: In function 'int main()': main.cpp:45:20: warning: unused variable 'val1' [-Wunused-variable] 45 | double val1 = it2->first, val2 = it2->second; | ^~~~ main.cpp:45:39: warning: unused variable 'val2' [-Wunused-variable] 45 | double val1 = it2->first, val2 = it2->second; | ^~~~ main.cpp:50:20: warning: unused variable 'val3' [-Wunused-variable] 50 | double val3 = it3->first, val4 = it3->second; | ^~~~ main.cpp:50:39: warning: unused variable 'val4' [-Wunused-variable] 50 | double val3 = it3->first, val4 = it3->second; | ^~~~