Compilare: user.cpp: In function ‘int equal(int, int)’: user.cpp:24:17: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (a==0&&b || b==0&&a) return 0;} ^ user.cpp: In function ‘int main()’: user.cpp:54:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<newo.size()-1;++i){ ^ user.cpp:56:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (newo[i] == newo[j] && j < newo.size()) ++j; ^ user.cpp:61:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<newo.size();++i){ ^ user.cpp:32:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pluton.in", "r", stdin); ^ user.cpp:33:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("pluton.out", "w", stdout); ^ user.cpp:35:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int nrp = 0; scanf ("%d",&n); ^ user.cpp:37:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &ar[i]); ^ user.cpp:67:37: warning: ‘Q’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (i=1;i<=n;i++) if (equal(Q,ar[i])) printf ("%d ", ar[i]); ^