Compilare: user.cpp: In function ‘int main()’: user.cpp:8:8: warning: unused variable ‘k’ [-Wunused-variable] double k,max; ^ user.cpp:5:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen ("euro2.in","r",stdin); ^ user.cpp:6:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("euro2.out","w",stdout); ^ user.cpp:9:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:11:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf",&v[i]); ^ user.cpp:70:25: warning: ‘sw’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d",v1[sw]+v2[sw+1]); ^