Compilare: user.cpp: In function ‘int main()’: user.cpp:80:36: 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:81:38: 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:83:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:87:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &a[i][j]); ^ user.cpp: In function ‘void climb(int, int)’: user.cpp:75:24: warning: ‘yf’ may be used uninitialized in this function [-Wmaybe-uninitialized] print_route(xf, yf); ^ user.cpp:75:24: warning: ‘xf’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp: In function ‘int main()’: user.cpp:99:16: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] climb(x, y); ^ user.cpp:99:16: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized]