Compilare: main.c: In function 'main': main.c:26:16: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] else if(x[1]==3) ^ main.c:43:20: warning: operation on 'd' may be undefined [-Wsequence-point] y[d]=x[d++]; ~^~ main.c:41:15: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(k) ^ main.c:5:2: 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); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:32: 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); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:64: 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); ^~~~~~~~~~~~~~ main.c:7:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&g); ^~~~~~~~~~~~~~ main.c:9:13: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",x+i); ^~~~~~~~~~~~~~~