Compilare: user.cpp: In function ‘int main()’: user.cpp:7:33: warning: unused variable ‘valst’ [-Wunused-variable] float a[11], st=-20, dr=20, valst=0, valdr=0, valm=0, m; ^ user.cpp:7:42: warning: unused variable ‘valdr’ [-Wunused-variable] float a[11], st=-20, dr=20, valst=0, valdr=0, valm=0, m; ^ user.cpp:8:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radacina.in","r",stdin); ^ user.cpp:9:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radacina.out","w",stdout); ^ user.cpp:10:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:11:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i=0; i<=n; i++) scanf("%f",&a[i]); ^ user.cpp:21:18: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%f",m); ^