C++ char*，const char*，string的相互转换

mildcat

C++ char*，const char*，string的相互转换
& H1 o% s; h$ T7 R3 e

1. string转const char*
) |! @4 u" s9 f$ L
string s ="abc";
consTChar* c_s = s.c_str();
2. const char*转string
   直接赋值即可
$ y! R& X, Q" p( {) C
constchar* c_s ="abc";
0 N7 l* f+ s& b% U* hstring s(c_s);
/ [+ }6 P: T6 B* \$ N6 O 3. string转char*
string s ="abc";
char* c;
. E5 C; [5 a0 ^) L$ w3 a2 E9 U# Bconstint len = s.length();
c =newchar[len+1];
8 R7 a( ]/ |6 X0 mstrcpy(c,s.c_str());
; `1 S; j& C' o5 I. T* x' t6 o- ~
* d! F) h; J/ C 4. char*转string

char* c ="abc";
; j6 |  q2 x. p5 }9 Bstring s(c);
- Z; j- N( J, e8 K" m' ? 5. const char*转char*
  @2 H" ^4 v( Y% @: C" M
6 v) u+ e8 T7 j( `1 m# tconstchar* cpc ="abc";
0 P2 j, z' y6 q0 d- _! O. Fchar* pc =newchar[100];//足够长
strcpy(pc,c
8 z& n; j) `2 Z