41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
#include <bits/stdc++.h>
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using namespace std;
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int n; //n条指令
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string s; //原来的字符串
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string a; //要追加的字符串
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int opt; //操作命令，1：追加，2：截取，3：插入，4：查找
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int l; //从第几个开始截取
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int cnt; //截取几个字符
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int main() {
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cin >> n >> s;
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while (n--) {
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cin >> opt;
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switch (opt) {
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case 1: //追加
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cin >> a;
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//s.append(a);
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s += a;
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cout << s << endl;
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break;
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case 2://截取
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cin >> l >> cnt;
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s = s.substr(l, cnt);
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cout << s << endl;
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break;
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case 3: //插入
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cin >> l >> a;
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s.insert(l, a);
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cout << s << endl;
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break;
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case 4: //查找位置
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cin >> a;
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auto pos = s.find(a);
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if (pos == s.npos) printf("%d\n", -1);
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else printf("%d\n", pos);
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break;
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}
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}
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return 0;
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} |