Compilare: main.cpp: In function 'int copie(int)': main.cpp:26:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int invers()': main.cpp:36:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int sortaresir()': main.cpp:56:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:111:34: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] sir[NUM][val[NUM]-1]=NULL; ^~~~