C++ char*，const char*，string的相互转换

mildcat

C++ char*，const char*，string的相互转换
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1. string转const char*

( B6 |; K4 i+ I7 y( d# a' tstring s ="abc";
consTChar* c_s = s.c_str();
9 T' I& E4 e& g4 q5 {& \2. const char*转string
   直接赋值即可

constchar* c_s ="abc";
string s(c_s);
3. string转char*
0 ^# n" Q0 c% Pstring s ="abc";
) d- w6 H  e8 _# i& V) schar* c;
constint len = s.length();
. a, `0 ^% u# K3 O9 bc =newchar[len+1];
strcpy(c,s.c_str());

4. char*转string

8 c- B/ R2 Z4 ^* Q: O+ x/ B' Pchar* c ="abc";
7 L2 X) Q& v8 u. _string s(c);
5. const char*转char*

6 Q0 [; R8 t# J$ F" `constchar* cpc ="abc";
char* pc =newchar[100];//足够长
strcpy(pc,c

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