Compilare: main.c: In function 'A': main.c:20:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(i+u<=p) ^ main.c: In function 'main': main.c:29:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("spirala2.in","r",stdin),freopen("spirala2.out","w",stdout),scanf("%d%d",&n,&r); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:29:38: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("spirala2.in","r",stdin),freopen("spirala2.out","w",stdout),scanf("%d%d",&n,&r); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:29:73: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("spirala2.in","r",stdin),freopen("spirala2.out","w",stdout),scanf("%d%d",&n,&r); ^~~~~~~~~~~~~~~~~~~