Compilare: user.c: In function ‘main’: user.c:55:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &e); ^ user.c:57:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y); ^ user.c:85:56: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(((v[i]==a)&&(v[i-1]==b))||((v[i]==b)&&(v[i-1]==a))){ ^