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*
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string s ="abc";
( X  g- v3 f2 I* X% ]+ pconsTChar* c_s = s.c_str();
+ O7 g- ^7 l6 l" g( x1 r7 e& g5 R2. const char*转string
   直接赋值即可

; b+ |; K' n% b3 Wconstchar* c_s ="abc";
; v* e1 g! }: e& Qstring s(c_s);
3. string转char*
9 ]( F% X  Y/ a# U6 u7 lstring s ="abc";
, R/ \  }" B/ w( pchar* c;
8 e' i9 g# S& t0 |$ c. ]constint len = s.length();
c =newchar[len+1];
strcpy(c,s.c_str());
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  i, k: U/ Z  f& ^' s8 S; _+ y, i% o 4. char*转string

" \( N5 v2 I! U1 Lchar* c ="abc";
/ F& N$ v; D7 C- zstring s(c);
4 R5 N0 z  V7 O6 H4 L 5. const char*转char*

constchar* cpc ="abc";
, o) I6 G# H0 I  s1 achar* pc =newchar[100];//足够长
strcpy(pc,c
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