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#include"iostream" #include"string" using namespace std ; int main() { //
1.追加字符数组 string &operator+=(const char * str) string a="Hello ,,,"; a+="add
some string to this "; cout<<a<<endl; // 2.追加一些字符 string &operator+=(const char
c) string b="this is b string ..."; b+='c'; cout<<b<<endl; // 3.追加字符串 string
&operator+=(const string & str) string c="THis is c string ..."; string c1="c1
string "; c+=c1; cout<<c<<endl; // 1.追加字符数组 string & append(const char *s);
string d="start"; d.append("Hello"); cout<<d<<endl; // 2.追加字符数组的前n个字符 string
&append(const char *s,int n) string e="start";
e.append("startstartstartterminal",10); cout<<e<<endl; // 3.追加字符串 string
&append(const string &s) string f="makefile"; f.append(e); cout<<e<<endl; //
4.从pos开始向后追加n个字符 string &append(const string &s,int pos,int n) string n="start
this is my lover"; string g="hello"; g.append(n,5,10); cout<<g<<endl; return 0;
}