C++ char*，const char*，string的相互转换

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C++ char*，const char*，string的相互转换


% O# w1 B3 F# m1. string转const char*
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string s ="abc";
, N1 X9 O" I  e( _consTChar* c_s = s.c_str();
5 Q/ K- X, n, f2. const char*转string
   直接赋值即可

% M3 [* a' j: V8 R+ c3 ?constchar* c_s ="abc";
/ C1 m9 `8 {* e) O0 i+ v8 Xstring s(c_s);
3. string转char*
1 c; L; N  ~+ Rstring s ="abc";
4 E5 J3 L) w$ E" achar* c;
constint len = s.length();
c =newchar[len+1];
strcpy(c,s.c_str());
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4. char*转string
. W0 K5 a- u- ~9 D, n0 ~$ I- w5 c
# A+ K. V0 r  }8 R( C' _' zchar* c ="abc";
5 p! F, B0 n+ r" f7 Lstring s(c);
5. const char*转char*

* W- I0 Y, H  pconstchar* cpc ="abc";
% I0 I7 C: ~( M# x7 @char* pc =newchar[100];//足够长
/ `" y, T6 U$ E5 ^1 nstrcpy(pc,c
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