Compilare: user.cpp: In function ‘void Test()’: user.cpp:90:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &net.N, &M), net.S = 1, net.D = net.N; ^ user.cpp:94:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &x, &y, &c); ^ user.cpp: In function ‘int main()’: user.cpp:113:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("politia.in", "r", stdin); ^ user.cpp:114:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("politia.out", "w", stdout); ^ user.cpp: In function ‘void Next()’: user.cpp:170:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (sir, 1, maxl, stdin), pos = 0; ^