Compilare: user.cpp: In function ‘int main()’: user.cpp:24:15: warning: unused variable ‘x’ [-Wunused-variable] int i, j, x, y, t, d; ^ user.cpp:24:18: warning: unused variable ‘y’ [-Wunused-variable] int i, j, x, y, t, d; ^ user.cpp:24:21: warning: unused variable ‘t’ [-Wunused-variable] int i, j, x, y, t, d; ^ user.cpp:24:24: warning: unused variable ‘d’ [-Wunused-variable] int i, j, x, y, t, d; ^ user.cpp:21:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reteta.in","r",stdin); ^ user.cpp:22:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reteta.out","w",stdout); ^ user.cpp:26:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:29:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v[i].a[0],&v[i].valori); ^ user.cpp:31:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i].a[j]); ^ user.cpp:35:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%f",&preturi[i]); ^