Compilare: user.cpp: In function ‘int main()’: user.cpp:16:15: warning: unused variable ‘ma’ [-Wunused-variable] float ma, s, nr; ^ user.cpp:8:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cool.in", "r", stdin); ^ user.cpp:9:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cool.out", "w", stdout); ^ user.cpp:10:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d %d\n", &cer, &n, &k); ^ user.cpp:15:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^ user.cpp:27:54: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(vmin!=1001 && vmax!=-1 && (float)s/nr==(float)(vmin+vmax)/2) ^ user.cpp:27:54: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized]