蓝桥杯 字符串编辑 字符串操作

 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 int main() {
 4     string s;
 5     getline(cin, s);
 6     string a, b, c;
 7     cin >> a;
 8     int len = s.length();
 9     int t;
10     if (a[0] == ‘D‘) {
11         cin >> b;
12         t = 0;
13         for (int i = 0; i < len; i++) {
14             if (s[i] == b[0]) {
15                 break;
16             }
17             t++;
18         }
19         for (int i = t + 1; i < len; i++) {
20             s[i - 1] = s[i];    
21         }
22         len--;
23         for (int i = 0; i < len; i++) {
24             cout << s[i];
25         }
26         cout << endl;
27     } else if (a[0] == ‘I‘) {
28         cin >> b >> c;
29         t=0;
30         for (int i = 0; i < len; i++) {
31             if (s[i] == b[0]) {
32                 t = i; 
33             }
34         }
35         for (int i = len - 1; i >= t; i--) {
36             s[i + 1] = s[i];    
37         }
38         len++;
39         s[t] = c[0];
40         for (int i = 0; i <= len ; i++) {
41             cout << s[i];
42         }
43         cout << endl;
44     } else if (a[0] == ‘R‘) {
45         cin >> b >> c;
46         t = 0;
47         for (int i = 0; i < len; i++) {
48             if (s[i] == b[0]) {
49                 s[i] = c[0];
50             }
51         }
52         for (int i = 0; i < len; i++) {
53             cout << s[i];
54         }
55         cout << endl;
56     }
57     return 0;
58 } 
59  

 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 string str;
 4 char edit;
 5 char a1, a2;
 6 int main() {
 7     getline(cin, str);
 8     cin >> edit;
 9     str = str.substr(0, str.find_first_of(".") + 1);
10     string tempstr = str;
11     switch (edit)
12     {
13         case ‘D‘:cin >> a1; str = str.erase(str.find_first_of(a1), 1); break;
14         case ‘I‘:cin >> a1 >> a2; str = str.insert(str.find_last_of(a1), 1, a2); break;
15         case ‘R‘:cin >> a1 >> a2; replace(str.begin(), str.end(), a1, a2); break;
16         default:
17             break;
18     }
19     if (str == tempstr)
20         cout << "no exist";
21     else cout << str;
22     return 0;
23 }