1 #include <iostream>
2 #include <cstdio>
3 #include <cstring>
4 using namespace std;
5 struct Set {
6 bool mark[128];
7 Set() {
8 memset(mark, 0, sizeof(mark));
9 }
10 bool &operator [] (int x) {
11 return mark[x];
12 }
13 void inp(char ss[]) {
14 cout<< ss;
15 char str[102];
16 cin>> str;
17 for(int i = 0; str[i]; i++) {
18 if(str[i] == '$') break;
19 mark[str[i]] = 1;
20 }
21 }
22 void outp(char str[]) {
23 cout<< str;
24 for(char i = 0; i < 128 && i >= 0; i++) {
25 if(mark[i]) cout<< i<< " ";
26 }
27 cout<< endl;
28 }
29 void intersectionSet(Set A, Set B) {
30 for(int i = 0; i < 128; i++) {
31 (*this)[i] = A[i] && B[i];
32 }
33 }
34 void unionSet(Set A, Set B) {
35 for(int i = 0; i < 128; i++) {
36 (*this)[i] = A[i] || B[i];
37 }
38 }
39 };
40 int main()
41 {
42 while(1) {
43 Set A, B, C, D;
44 A.inp("A: ");
45 B.inp("B: ");
46 C.intersectionSet(A, B);
47 D.unionSet(A, B);
48 C.outp("A ^ B: ");
49 D.outp("A v B: ");
50 }
51 return 0;
52 }
