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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$ g. T! z+ D( z- N. ?5 x1. string转const char*
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string s ="abc";
- v. m  [, k6 q+ P6 y7 \consTChar* c_s = s.c_str();
2. const char*转string
  _# X( O2 `5 |  U  u' }1 d   直接赋值即可
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constchar* c_s ="abc";
: s* C4 L1 g& M  W  U; E+ ostring s(c_s);
- n/ j7 o0 n0 }2 X+ Q9 ?+ H 3. string转char*
string s ="abc";
char* c;
( s1 h5 c- \$ S3 t/ W7 ]/ pconstint len = s.length();
+ i5 ]" I+ s7 j4 C: Ec =newchar[len+1];
strcpy(c,s.c_str());

6 w9 A# Y3 _8 t9 w8 o 4. char*转string
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char* c ="abc";
string s(c);
5. const char*转char*
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; S( U5 w6 a9 f# A) v3 |6 K4 G: `constchar* cpc ="abc";
char* pc =newchar[100];//足够长
strcpy(pc,c

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