第31238题 单选题
以下C++代码的运行输出结果是?
#include <iostream>
#include <map>
using namespace std;
int main() {
    map<int, string> m;
    m[1] = "one";
    m.insert(make_pair(2, "two"));
    m[2] = "second";
    m.insert(make_pair(1, "first"));
    cout << m.size() << " " << m[1] << " " << m[2] << endl;
    return 0;
}
A

2 one second

B

2 first two

C

4 one two

D

4 first second

程序运行统计
暂无判题统计
提交0次 正确率0.00%
答案解析