Compilare: user.cpp: In function ‘bool bin(int, int)’: user.cpp:10:22: warning: unused variable ‘s’ [-Wunused-variable] int st, dr, mid, s, t, d; ^ user.cpp:10:25: warning: unused variable ‘t’ [-Wunused-variable] int st, dr, mid, s, t, d; ^ user.cpp:10:28: warning: unused variable ‘d’ [-Wunused-variable] int st, dr, mid, s, t, d; ^ user.cpp: In function ‘int main()’: user.cpp:35:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, s, t, d, k; ^ user.cpp:35:24: warning: unused variable ‘t’ [-Wunused-variable] int n, m, i, j, s, t, d, k; ^ user.cpp:35:27: warning: unused variable ‘d’ [-Wunused-variable] int n, m, i, j, s, t, d, k; ^ user.cpp:35:30: warning: unused variable ‘k’ [-Wunused-variable] int n, m, i, j, s, t, d, k; ^ user.cpp:32:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cocochanel.in","r",stdin); ^ user.cpp:33:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cocochanel.out","w",stdout); ^ user.cpp:37:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:39:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ user.cpp:43:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x[i]); ^