Compilare: user.cpp: In function ‘int main()’: user.cpp:21:15: warning: unused variable ‘j’ [-Wunused-variable] int n, i, j, s, t, d, l, ma; ^ user.cpp:21:18: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, s, t, d, l, ma; ^ user.cpp:21:21: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, s, t, d, l, ma; ^ user.cpp:21:24: warning: unused variable ‘d’ [-Wunused-variable] int n, i, j, s, t, d, l, ma; ^ user.cpp:21:27: warning: unused variable ‘l’ [-Wunused-variable] int n, i, j, s, t, d, l, ma; ^ user.cpp:21:30: warning: unused variable ‘ma’ [-Wunused-variable] int n, i, j, s, t, d, l, ma; ^ user.cpp:17:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xspe.in","r",stdin); ^ user.cpp:18:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xspe.out","w",stdout); ^ user.cpp:23:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:25:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i].x); ^