Compilare: user.cpp: In function ‘int fill(int, int, int)’: user.cpp:43:42: warning: ‘revdir’ may be used uninitialized in this function [-Wmaybe-uninitialized] int d, dif = inf, p_ln = inf, p_col, revdir; ^ user.cpp: In function ‘int main()’: user.cpp:116:26: warning: ‘p_col’ may be used uninitialized in this function [-Wmaybe-uninitialized] int dif = inf, p_ln, p_col; ^ user.cpp:116:20: warning: ‘p_ln’ may be used uninitialized in this function [-Wmaybe-uninitialized] int dif = inf, p_ln, p_col; ^ /tmp/ccX3MbmC.o: In function `main': user.cpp:(.text.startup+0x80): warning: the `gets' function is dangerous and should not be used.