Compilare: main.cpp: In function 'int aduna(int, int, int, int)': main.cpp:14:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int aduna_prim(int, int, int, int)': main.cpp:20:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:24:15: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] a[2]=b[2]=NULL; ^~~~