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*
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1 R! v& O8 J: e! M' gstring s ="abc";
consTChar* c_s = s.c_str();
2. const char*转string
7 c$ \. c/ f1 a* v3 F  H   直接赋值即可

0 l0 M6 m5 @1 m5 L6 fconstchar* c_s ="abc";
string s(c_s);
3. string转char*
string s ="abc";
char* c;
constint len = s.length();
c =newchar[len+1];
3 H) s; m( G$ y9 d+ v6 M# c) rstrcpy(c,s.c_str());

4. char*转string

$ z8 v3 B. I9 D. e; Y! lchar* c ="abc";
string s(c);
5. const char*转char*
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1 f6 r0 d. ?: k+ I! H  [5 Oconstchar* cpc ="abc";
char* pc =newchar[100];//足够长
strcpy(pc,c
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