string加前綴和后綴

Practice 9.45

#include <iostream> #include <queue> #include <string> #include <vector> #include <algorithm> #include <list> #include <iterator> #include <cmath> #include <cstring> #include <forward_list> #include <sstream> using namespace std;string add_pre_post(string s, string pre, string post) {s.insert(0, pre);s.append(post);return s; }int main() {string s, pre, post;cin >> s >> pre >> post;cout << "s: " << s << endl;cout << "pre: " << pre << endl;cout << "post: " << post << endl;cout << add_pre_post(s, pre, post) << endl;return 0; }

Output

Practice

s: Haijia pre: Ms. post: Jin Ms.HaijiaJin #include <iostream> #include <queue> #include <string> #include <vector> #include <algorithm> #include <list> #include <iterator> #include <cmath> #include <cstring> #include <forward_list> #include <sstream> using namespace std;string add_pre_post_2(string s, string pre, string post) {s.insert(0, pre);s.insert((int)s.length(), post);return s; }int main() {string s, pre, post;cin >> s >> pre >> post;cout << "s: " << s << endl;cout << "pre: " << pre << endl;cout << "post: " << post << endl;cout << add_pre_post_2(s, pre, post) << endl;return 0; }

Output

s: Haijia pre: Ms. post: Jin Ms.HaijiaJin

剛才矯情了。

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