Compilare: main.cpp: In function 'int main()': main.cpp:65:13: warning: unused variable 'a' [-Wunused-variable] 65 | int a,b,c,d; | ^ main.cpp:65:15: warning: unused variable 'b' [-Wunused-variable] 65 | int a,b,c,d; | ^ main.cpp:65:17: warning: unused variable 'c' [-Wunused-variable] 65 | int a,b,c,d; | ^ main.cpp:65:19: warning: unused variable 'd' [-Wunused-variable] 65 | int a,b,c,d; | ^