Compilare: user.cpp: In function ‘void submultimi()’: user.cpp:17:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (x>>j&1!=0) a[++lg]=1; ^ user.cpp: In function ‘int main()’: user.cpp:31:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("minesweeper2.in","r",stdin); ^ user.cpp:32:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("minesweeper2.out","w",stdout); ^ user.cpp:34:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:36:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^