Compilare: user.cpp: In function ‘void lee(int, int, int)’: user.cpp:30:58: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (obstacle[xx][yy]==true||xx>n||yy>n&&xx<=0&&yy<=0)continue; ^ user.cpp: In function ‘int main()’: user.cpp:47:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ai.in","r",stdin); ^ user.cpp:48:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ai.out","w",stdout); ^ user.cpp: In function ‘void get(int&)’: user.cpp:129:51: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (buffer, NMAX, 1, stdin), bufpoz = 0; ^ user.cpp:137:55: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (buffer, 1, NMAX, stdin), bufpoz = 0; ^ user.cpp:144:55: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (buffer, 1, NMAX, stdin), bufpoz = 0; ^