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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5 M  @0 E/ w$ P1. string转const char*

) o; W' r# _  d7 Fstring s ="abc";
* S: B0 L  u& q  ?consTChar* c_s = s.c_str();
2. const char*转string
; d- u; A- B1 X1 D% X. q% H9 `% b) M   直接赋值即可
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) W0 d" n+ D7 Z! r! F4 rconstchar* c_s ="abc";
3 E3 s% v% G1 g. pstring s(c_s);
3. string转char*
string s ="abc";
char* c;
; s! M! s  q, Y$ n5 x& y- r! c$ ^; Zconstint len = s.length();
. F, d6 I% D$ `5 b7 |- A! {c =newchar[len+1];
strcpy(c,s.c_str());

4. char*转string
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  `8 g$ @0 ?$ {9 \char* c ="abc";
string s(c);
5. const char*转char*
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constchar* cpc ="abc";
: w3 I- u0 s# {4 ~' ~char* pc =newchar[100];//足够长
- `+ K1 V$ K6 f" S. O$ R' vstrcpy(pc,c

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