Compilare: user.cpp: In function ‘void fill_up(int, int, int)’: user.cpp:32:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(verif(xx,yy)) ^ user.cpp: In function ‘void fill_down(int, int, int)’: user.cpp:51:10: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(verif(xx,yy)) ^ user.cpp: In function ‘int main()’: user.cpp:63:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.in", "r", stdin); ^ user.cpp:64:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.out", "w", stdout); ^ user.cpp:66:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:69:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^