Compilare: user.cpp: In function ‘void read()’: user.cpp:37:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:38:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &t); ^ user.cpp:41:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &w[i].x, &w[i].y, &w[i].z); ^ user.cpp:49:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] v[i].z = i; ^ user.cpp: In function ‘int main()’: user.cpp:73:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("galerie.in", "r", stdin); ^ user.cpp:74:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("galerie.out", "w", stdout); ^