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*

( {( g5 J* z0 ~3 |9 {% ]) d2 Lstring s ="abc";
# K' W* _" Q- [- ?3 y1 o' lconsTChar* c_s = s.c_str();
( q! k  s5 x" l' b/ j5 u2. const char*转string
, q; J; y! h7 @, v0 I   直接赋值即可

) l$ e$ v! L- P# qconstchar* c_s ="abc";
string s(c_s);
3. string转char*
: ]" u# E' @9 cstring s ="abc";
char* c;
constint len = s.length();
6 D* a7 p: |; G. s& e' Bc =newchar[len+1];
9 c& W( T9 x/ N: r$ ~- Mstrcpy(c,s.c_str());

4. char*转string
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char* c ="abc";
string s(c);
5. const char*转char*
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7 y% w0 C& U0 }1 Gconstchar* cpc ="abc";
* k/ M2 G8 R/ Pchar* pc =newchar[100];//足够长
strcpy(pc,c