Compilare: main.cpp: In function 'int main()': main.cpp:20:12: warning: variable 'p2' set but not used [-Wunused-but-set-variable] int x, p2, p3; ^~ main.cpp:16:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("calorifer.in", "r", stdin); ^ main.cpp:17:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("calorifer.out", "w", stdout); ^ main.cpp:19:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:22:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i].x); ^