C++ char*，const char*，string的相互转换

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C++ char*，const char*，string的相互转换

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1. string转const char*
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string s ="abc";
consTChar* c_s = s.c_str();
- l9 ]. P0 ?5 b; ]8 t2. const char*转string
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constchar* c_s ="abc";
* H+ w) E$ Y0 j  }/ U1 ^string s(c_s);
3. string转char*
1 q, c! b" ]2 \string s ="abc";
3 {) A1 Z# I2 [& e9 Hchar* c;
2 A: I0 h) N) U' mconstint len = s.length();
5 b! `: F& x0 N3 M/ P6 lc =newchar[len+1];
% k. Y1 \5 @8 X# c$ l! Sstrcpy(c,s.c_str());
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4. char*转string
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3 v4 E) d( r+ B& hchar* c ="abc";
string s(c);
5. const char*转char*
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constchar* cpc ="abc";
2 _, r8 P8 q, E1 h' ^; Uchar* pc =newchar[100];//足够长
5 \; @3 a  ~' k. j$ Wstrcpy(pc,c
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