蓝桥杯 字符串的展开 字符串操作

 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 int main() {
 4     int p1, p2, p3;
 5     string s;
 6     cin >> p1 >> p2 >> p3 >> s;
 7     for (int i = 0; i < s.size(); i++) {
 8         cout << s[i];
 9         if (i < s.size() - 2 && s[i + 1] == ‘-‘ &&
10             ((isdigit(s[i]) && isdigit(s[i + 2])) || (islower(s[i]) && islower(s[i + 2])))) {
11             char c1 = s[i], c2 = s[i + 2];
12             string ans = "";
13             if (c1 >= c2) {
14                 ans = "-";
15             } else if (c1 + 1 == c2) {
16                 ans = "";
17             } else {
18                 if (p3 == 1) {
19                     for (int i = c1 + 1; i < c2; i++) {
20                         if (p1 == 1) {
21                             ans.append(p2, tolower((char) i));
22                         }
23                         if (p1 == 2) {
24                             ans.append(p2, toupper((char) i));
25                         }
26                         if (p1 == 3) {
27                             ans.append(p2, ‘*‘);
28                         }
29                     }
30                 }
31                 if (p3 == 2) {
32                     for (int i = c2 - 1; i > c1; i--) {
33                         if (p1 == 1) {
34                             ans.append(p2, tolower((char) i));
35                         }
36                         if (p1 == 2) {
37                             ans.append(p2, toupper((char) i));
38                         }
39                         if (p1 == 3) {
40                             ans.append(p2, ‘*‘);
41                         }
42                     }
43                 }
44             }
45             cout << ans;
46             i++;
47         }
48     }
49     return 0;
50 }