Compilare: user.cpp: In function ‘int cb(int, int, int)’: user.cpp:23:12: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] return r; ^ user.cpp: In function ‘int acb(int, int, int)’: user.cpp:41:12: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] return r; ^ user.cpp: In function ‘int main()’: user.cpp:55:17: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( nr1 <= i && i <= nr2 ) ^ user.cpp:55:27: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( nr1 <= i && i <= nr2 ) ^