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 ]6 [7 x' c" H1 y$ e, Z$ p1. string转const char*

string s ="abc";
consTChar* c_s = s.c_str();
/ B9 }" [' a, W( M* E2. const char*转string
4 y1 L, v9 U' v* g0 a. \   直接赋值即可

! O8 E9 `9 {' Uconstchar* c_s ="abc";
3 H! i  Y5 P5 w0 h6 t+ j9 qstring s(c_s);
3. string转char*
string s ="abc";
char* c;
. R, v1 ^9 [4 G; _6 d8 Fconstint len = s.length();
! }& P6 \  G2 K+ n4 Oc =newchar[len+1];
strcpy(c,s.c_str());
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: q5 }3 O) K2 V2 x* W0 e' _1 L2 U 4. char*转string
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char* c ="abc";
string s(c);
4 V. e4 c" \+ W6 e 5. const char*转char*
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1 ~' s) A8 s5 ~constchar* cpc ="abc";
( |7 P" ?  P0 c6 L. G! Ichar* pc =newchar[100];//足够长
' O% |3 v9 Z2 T9 V+ F) B4 Estrcpy(pc,c
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