Compilare: user.c: In function ‘verif’: user.c:8:11: warning: unused variable ‘k’ [-Wunused-variable] int j,k; ^ user.c:8:9: warning: unused variable ‘j’ [-Wunused-variable] int j,k; ^ user.c: In function ‘main’: user.c:81:13: warning: statement with no effect [-Wunused-value] c[j]==0; ^ user.c:68:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("perle.in","r",stdin); ^ user.c:69:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("perle.out","w",stdout); ^ user.c:70:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.c:74:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.c:76:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[j]); ^