ca *DelStr(ca *L) { ca *H = L; char s[80], *q; ca *p; cout<<"输入该子串: "; cin>>s; if (H->c == *s) { for (p = H->next, q = s+1; *q != '\0' && p->next; p = p->next, q++) if (p->c != *q) break; if (*q == '\0') H = p; } while(L->next) { for (p = L->next, q = s; *q != '\0' && p->next; p = p->next, q++) if (p->c != *q) break; if (*q == '\0') L->next = p; else L = L->next; } return H; } void print1(ca *L) { while(L->next) { cout<c; L = L->next; } cout<next; L = L->next, n++) if(isalpha(L->c)) p1++; else if(isdigit(L->c)) p2++; else if(L->c == ' ') p3++; else if(L->c == '\n') n--; cout<<"\n 全部字母数: "<

void main() { ca *L = new ca; int p1, p2, p3, n, c; InitList(L); do {cout<<"\n0:退出\n" "1:统计中英文字母和空格数以及整篇文章总字数\n" "2:统计某一字符串在文章中出现次数\n" "3:删除某一子串\n" "4:分行输出用户输入的各行字符\n"; cin>>c; switch(c) { case 1:print2(L, p1, p2, p3, n);break; case 2:StrNo(L);break; case 3:DelStr(L); case 4:print1(L); } }while(c); }