Compilare: user.cpp: In function ‘int main()’: user.cpp:58:9: warning: unused variable ‘x’ [-Wunused-variable] int m, x, y, p, r, op, node; ^ user.cpp:58:12: warning: unused variable ‘y’ [-Wunused-variable] int m, x, y, p, r, op, node; ^ user.cpp:58:15: warning: unused variable ‘p’ [-Wunused-variable] int m, x, y, p, r, op, node; ^ user.cpp:58:18: warning: unused variable ‘r’ [-Wunused-variable] int m, x, y, p, r, op, node; ^ user.cpp:58:21: warning: unused variable ‘op’ [-Wunused-variable] int m, x, y, p, r, op, node; ^ user.cpp:58:25: warning: unused variable ‘node’ [-Wunused-variable] int m, x, y, p, r, op, node; ^ user.cpp:55:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("treesmen.in", "r", stdin); ^ user.cpp:56:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("treesmen.out", "w", stdout); ^ user.cpp:60:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:64:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &ancestor[i+2]); ^ user.cpp:70:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^