C++ char*，const char*，string的相互转换

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C++ char*，const char*，string的相互转换
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1. string转const char*

string s ="abc";
! T4 Q. t% g' _7 w. IconsTChar* c_s = s.c_str();
2. const char*转string
   直接赋值即可
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constchar* c_s ="abc";
string s(c_s);
  U3 @6 P2 M: `2 U, W 3. string转char*
string s ="abc";
char* c;
4 Y% i  c' ]' q8 p: L( {! O) zconstint len = s.length();
1 ]+ @3 L# S3 m, A5 Pc =newchar[len+1];
strcpy(c,s.c_str());
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" y# T. V: e  J  Q5 h 4. char*转string

' \7 ?# x, {9 hchar* c ="abc";
string s(c);
1 u6 c8 o4 X3 @- l8 O/ @ 5. const char*转char*

2 C$ x0 ~8 \, ?0 I3 G/ Q4 nconstchar* cpc ="abc";
char* pc =newchar[100];//足够长
# n0 e5 o& ]3 i2 ]2 vstrcpy(pc,c