Compilare: main.cpp: In function 'int lee()': main.cpp:54:15: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(isin(x,y)) ^ main.cpp: In function 'int main()': main.cpp:81:9: warning: unused variable 'k' [-Wunused-variable] int k,val; ^ main.cpp:81:11: warning: unused variable 'val' [-Wunused-variable] int k,val; ^~~ main.cpp: In function 'int lee()': main.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type] } ^