C++ char*，const char*，string的相互转换

mildcat

C++ char*，const char*，string的相互转换
; E7 n0 g4 ]# L9 B! o6 K7 o

4 v1 j( P( O4 Z1. string转const char*

* ?, Q$ b6 c0 ~4 A& Istring s ="abc";
consTChar* c_s = s.c_str();
2. const char*转string
   直接赋值即可

constchar* c_s ="abc";
" ]3 p$ u# _8 q' Y$ t4 z) |. E3 v9 b" Vstring s(c_s);
* J" J4 e* w2 |, C4 s) ] 3. string转char*
" t" `, M! {+ P% W/ |string s ="abc";
. Q! E) k4 @2 r. E# S! o9 Echar* c;
constint len = s.length();
3 M6 j6 L! A7 P  q+ U, qc =newchar[len+1];
3 F; f: D" `) }. F/ ?strcpy(c,s.c_str());
& y; B  @, L$ m
' Y: [# Y+ N8 J- V1 Y 4. char*转string
8 Z1 L8 h3 K7 r/ A- j5 S7 C  e
char* c ="abc";
string s(c);
5. const char*转char*

  E+ }( {3 F. L$ ^! E0 V  ~- mconstchar* cpc ="abc";
/ q, x, C  O6 S# c4 `; p, y% K; Kchar* pc =newchar[100];//足够长
  v! O- p3 `) y, ?9 K; e, {. }strcpy(pc,c
; B" C0 }: [& Z