C++ char*，const char*，string的相互转换

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C++ char*，const char*，string的相互转换


5 C* e$ G2 L6 T) |4 \1. string转const char*

5 X" o( {2 n8 r4 Qstring s ="abc";
consTChar* c_s = s.c_str();
2. const char*转string
   直接赋值即可

3 E- Q# \" L7 d; L  iconstchar* c_s ="abc";
string s(c_s);
/ a* }3 e/ ?: \4 H/ m 3. string转char*
- j5 z% Q; a- O& t: g; b5 \, Vstring s ="abc";
char* c;
7 F8 N* ?, L  L' w1 Iconstint len = s.length();
c =newchar[len+1];
  @6 u, B  p. R' f7 c, `strcpy(c,s.c_str());

& k) ~2 ?! u# R1 X* K 4. char*转string
/ c' c+ G1 v/ g- V7 B8 W
9 ~! m1 T# l0 schar* c ="abc";
string s(c);
5. const char*转char*
; ?* U+ F+ [3 H" s* _4 J
constchar* cpc ="abc";
5 n' x! S7 ^+ R! z, Wchar* pc =newchar[100];//足够长
strcpy(pc,c

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