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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/ \& q, \5 t5 kstring s ="abc";
consTChar* c_s = s.c_str();
2. const char*转string
   直接赋值即可

2 o* `) u! A* j/ n$ G2 uconstchar* c_s ="abc";
& x0 @* U% A4 f+ Z' N0 m& Estring s(c_s);
3. string转char*
* A% \# ^) D& B' Mstring s ="abc";
) r) w% ?, [( n8 [char* c;
2 Z. @- {4 P% L* e8 {5 G4 i9 bconstint len = s.length();
c =newchar[len+1];
6 ]5 G5 n- ~& _/ ystrcpy(c,s.c_str());
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! S) v& f  N1 i+ B- J. p2 z 4. char*转string
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char* c ="abc";
! b9 B% ~0 {6 Hstring s(c);
9 B, T! @* v9 L) A  E$ K 5. const char*转char*
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0 r* d5 r( n6 w( d  d- Kconstchar* cpc ="abc";
char* pc =newchar[100];//足够长
/ [& i5 [. a, o6 M4 _" dstrcpy(pc,c
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