Compilare: user.cpp: In function ‘int main()’: user.cpp:20:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piata.in","r",stdin); ^ user.cpp:21:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piata.out","w",stdout); ^ user.cpp:22:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:23:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p1,&p2); ^ user.cpp:24:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p3,&p4); ^ user.cpp: In function ‘int SC(int)’: user.cpp:13:16: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] i+=x%10; ^ user.cpp: In function ‘int main()’: user.cpp:13:16: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:10:9: note: ‘i’ was declared here int i; ^