Compilare: main.cpp: In function 'int main()': main.cpp:11:12: warning: unused variable 'w' [-Wunused-variable] int n, g, w, p; ^ main.cpp:11:15: warning: unused variable 'p' [-Wunused-variable] int n, g, w, p; ^ main.cpp:8:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("energii.in", "r", stdin); ^ main.cpp:9:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("energii.out", "w", stdout); ^ main.cpp:12:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:13:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &g); ^ main.cpp:18:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &power[i], &costs[i]); ^