Compilare: user.cpp: In function ‘int cmd(int, int)’: user.cpp:13:14: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] r=a%b; ^ user.cpp: In function ‘int main()’: user.cpp:13:14: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:8:9: note: ‘r’ was declared here int r; ^ user.cpp:13:14: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] r=a%b; ^ user.cpp:8:9: note: ‘r’ was declared here int r; ^