Compilare: user.cpp: In function ‘unsigned int minRouteLength(smaze)’: user.cpp:93:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned int i = 0; i<N_MAX; i++) ^ user.cpp:118:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (xx == magicMaze.rowOfExit && ^ user.cpp:119:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] yy == magicMaze.columnOfExit) { ^ user.cpp: In function ‘int main()’: user.cpp:136:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alee.in", "r", stdin); ^ user.cpp:137:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alee.out", "w", stdout); ^ user.cpp:140:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:143:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &i, &j); ^ user.cpp:146:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &sx, &sy, &fx, &fy); ^