Compilare: main.cpp: In function 'int main()': main.cpp:29:9: warning: unused variable 'i' [-Wunused-variable] int i,j; ^ main.cpp:36:15: warning: unused variable 'k' [-Wunused-variable] int cnt=1,k=1,f=v[j].b; ^ main.cpp: In function 'bool ok(da, da)': main.cpp:25:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:36:26: warning: 'j' is used uninitialized in this function [-Wuninitialized] int cnt=1,k=1,f=v[j].b; ^