Compilare: main.cpp: In function 'int main()': main.cpp:9:12: warning: unused variable 'a' [-Wunused-variable] int n,i,a,S=0,ok=0,c1,c2,S1,x; ^ main.cpp:9:18: warning: unused variable 'ok' [-Wunused-variable] int n,i,a,S=0,ok=0,c1,c2,S1,x; ^~ main.cpp:9:23: warning: unused variable 'c1' [-Wunused-variable] int n,i,a,S=0,ok=0,c1,c2,S1,x; ^~ main.cpp:9:26: warning: unused variable 'c2' [-Wunused-variable] int n,i,a,S=0,ok=0,c1,c2,S1,x; ^~ main.cpp:10:9: warning: unused variable 'y' [-Wunused-variable] char y,z; ^ main.cpp:10:11: warning: unused variable 'z' [-Wunused-variable] char y,z; ^