Compilare: user.cpp: In function ‘int main()’: user.cpp:15:18: warning: unused variable ‘j’ [-Wunused-variable] int n, k, i, j, s, t, d, s1, s2, ok, ok2; ^ user.cpp:15:21: warning: unused variable ‘s’ [-Wunused-variable] int n, k, i, j, s, t, d, s1, s2, ok, ok2; ^ user.cpp:15:24: warning: unused variable ‘t’ [-Wunused-variable] int n, k, i, j, s, t, d, s1, s2, ok, ok2; ^ user.cpp:15:27: warning: unused variable ‘d’ [-Wunused-variable] int n, k, i, j, s, t, d, s1, s2, ok, ok2; ^ user.cpp:11:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.in","r",stdin); ^ user.cpp:12:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.out","w",stdout); ^ user.cpp:18:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%*c",&n); ^