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#include <stdio.h> #include <stdlib.h> struct item { int data; struct item *next; }; struct item * mklist(int lo, int hi) { if (lo > hi) return NULL; struct item * ls = (struct item *)malloc(sizeof (struct item)); ls->data = lo; ls->next = mklist(lo+1, hi); return ls; } void showlist(struct item * ls) { while (ls) { printf("%d ", ls->data); ls = ls->next; } printf("%s", "\n"); } void delsevens(struct item * ls) { struct item **e = &ls; while(*e) { if((*e)->data == 7) { *e = (*e)->next; continue; } e = &((*e)->next); } } int main (void) { struct item * list = mklist(1,10); showlist(list); delsevens(list); showlist(list); return 0; }
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