Compilare: user.cpp: In function ‘int bfs()’: user.cpp:26:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if((v[node.x][node.y] & u) == 0 && (v[node.x - 1][node.y] & d) == 0) ^ user.cpp:34:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if((v[node.x][node.y] & r) == 0 && (v[node.x][node.y + 1] & l) == 0) ^ user.cpp:51:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if((v[node.x][node.y] & l) == 0 && (v[node.x][node.y - 1] & r) == 0) ^ user.cpp: In function ‘int main()’: user.cpp:97:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("verlab.in", "r", stdin); ^ user.cpp:98:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("verlab.out", "w", stdout); ^ user.cpp:99:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:101:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &R, &C); ^ user.cpp:104:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[j][k]); ^