Compilare: user.cpp: In function ‘void fill_2(int, int, int)’: user.cpp:47:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if( new_x >= 1 && new_x <= N && new_y >= 1 && new_y <= M ) ^ user.cpp: In function ‘int main()’: user.cpp:61:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "unlock.in" , "r", stdin ); ^ user.cpp:62:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "unlock.out", "w", stdout ); ^ user.cpp:64:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &T ); ^ user.cpp:66:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d %d %d", &N, &M, &K ); nr_comp = 0; answer = 0; ^ user.cpp:70:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &A[i][j] ); ^