string加前缀和后缀

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

刚才矫情了。

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金海佳学C++primer9.45/9.46

string加前缀和后缀

Practice 9.45

Output

Practice

Output

刚才矫情了。

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