Compilare: main.cpp: In function 'int cb0(int)': main.cpp:9:7: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized] int val; ^~~ main.cpp: In function 'int cb1(int)': main.cpp:27:10: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized] return val; ^~~ main.cpp: In function 'int cb2(int)': main.cpp:37:10: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized] return val; ^~~ main.cpp: In function 'int main()': main.cpp:48:27: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized] if(q==2) g<<cb2(x); ^ main.cpp:47:27: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized] if(q==1) g<<cb1(x); ^