#include<iostream>
using namespace std;
#include <string>
void test01()
{
string str1;//默认构造
str1 = "helloworld!";
cout << "str1=" << str1 << endl;
string str2 = str1;
cout << "str2=" << str2 << endl;
string str3;
str3= 'a';
cout << "str3=" << str3 << endl;
string str4;
str4.assign("helloworld!!");
cout << "str4=" << str4 << endl;
string str5;
str5.assign("dsffsafg", 3);//前三个
cout << "str5=" << str5 << endl;
string str6;
str6.assign(str5);
cout << "str6=" << str6 << endl;
string str7;
str7.assign(10,'e');
cout << "str7=" << str7 << endl;
}
int main()
{
test01();
system("pause");
return 0;
}
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