Compilare: user.c: In function ‘main’: user.c:24:23: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(s[i]==c) ^ user.c:36:22: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(s[i]==c) ^ user.c:6:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("palind.in","r",stdin),freopen("palind.out","w",stdout),scanf("%d\n",&m); ^ user.c:6:43: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("palind.in","r",stdin),freopen("palind.out","w",stdout),scanf("%d\n",&m); ^ user.c:6:74: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("palind.in","r",stdin),freopen("palind.out","w",stdout),scanf("%d\n",&m); ^ user.c:8:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",s),n=strlen(s),memset(x,0,sizeof(x)); ^