Compilare: user.c: In function ‘delete’: user.c:61:3: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] } else if((pos << 1 + 1) > *last) { ^ user.c:70:3: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] } else if((h[pos << 1]->cost < h[pos]->cost) || (h[pos << 1 + 1]->cost < h[pos]->cost)) { ^ user.c:71:4: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if(h[pos << 1]->cost < h[pos << 1 + 1]->cost) { ^ user.c:77:5: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] swap(&h[pos << 1 + 1], &h[pos]); ^ user.c:79:5: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] p[h[pos << 1 + 1]->nod] = pos << 1 + 1; ^ user.c:79:5: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] user.c:80:5: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] pos = pos << 1 + 1; ^ user.c: In function ‘main’: user.c:111:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d\n", &n, &m); ^ user.c:119:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d\n", &a, &b, &c); ^