Compilare: user.c: In function ‘main’: user.c:25:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] else if(x[1]==3) ^ user.c:42:20: warning: operation on ‘d’ may be undefined [-Wsequence-point] y[d]=x[d++]; ^ user.c:40:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(k) ^ user.c:4:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("perle.in","r",stdin),freopen("perle.out","w",stdout),scanf("%d",&n); ^ user.c:4:39: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("perle.in","r",stdin),freopen("perle.out","w",stdout),scanf("%d",&n); ^ user.c:4:69: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("perle.in","r",stdin),freopen("perle.out","w",stdout),scanf("%d",&n); ^ user.c:6:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&g); ^ user.c:8:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",x+i); ^