Compilare: main.cpp: In function 'int main()': main.cpp:31:6: warning: unused variable 'x' [-Wunused-variable] int x = a[1][1], cop = a[1][1], cont = 0; ^ main.cpp:31:19: warning: unused variable 'cop' [-Wunused-variable] int x = a[1][1], cop = a[1][1], cont = 0; ^~~ main.cpp:31:34: warning: unused variable 'cont' [-Wunused-variable] int x = a[1][1], cop = a[1][1], cont = 0; ^~~~