Compilare: user.cpp: In function ‘int main()’: user.cpp:11:9: warning: unused variable ‘a1’ [-Wunused-variable] int a1,a2,a3,sum=0; ^ user.cpp:11:12: warning: unused variable ‘a2’ [-Wunused-variable] int a1,a2,a3,sum=0; ^ user.cpp:11:15: warning: unused variable ‘a3’ [-Wunused-variable] int a1,a2,a3,sum=0; ^ user.cpp:11:18: warning: unused variable ‘sum’ [-Wunused-variable] int a1,a2,a3,sum=0; ^ user.cpp:9:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri.in","r",stdin); ^ user.cpp:10:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri.out","w",stdout); ^ user.cpp:12:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i",&n); ^ user.cpp:15:59: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i %i %i %i %i %i %i",&x,&y,&z,&a,&b,&c,&d); ^