C++ char*，const char*，string的相互转换

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C++ char*，const char*，string的相互转换


1. string转const char*

1 d& \) `) Q5 F4 Vstring s ="abc";
, |" a1 }1 A1 C0 b) r" NconsTChar* c_s = s.c_str();
( v2 n7 [9 F8 F$ c2. const char*转string
   直接赋值即可
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constchar* c_s ="abc";
/ `; M" E2 R6 C* W0 v5 ^+ o9 rstring s(c_s);
3. string转char*
string s ="abc";
/ s1 a+ r. c$ ?% U0 b8 N+ ]/ W6 wchar* c;
' y1 n/ m. z$ K& uconstint len = s.length();
c =newchar[len+1];
strcpy(c,s.c_str());

0 p) h& i6 s/ q2 u2 d 4. char*转string
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char* c ="abc";
# m2 F, {5 V& w8 n' h, @4 ystring s(c);
5. const char*转char*

8 V( g+ z+ A! ?+ g9 ?+ t; bconstchar* cpc ="abc";
* @' E: q0 ]9 M; ?7 i! Dchar* pc =newchar[100];//足够长
- X8 [8 d& k3 R" H8 ]  jstrcpy(pc,c
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