C++ char*，const char*，string的相互转换

mildcat

C++ char*，const char*，string的相互转换
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1. string转const char*
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string s ="abc";
* p4 u% L! _# c: H/ QconsTChar* c_s = s.c_str();
8 h' u: k' N$ N& E( n  y2. const char*转string
   直接赋值即可
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/ P9 j6 n; ?' G# e- X# i, W* Pconstchar* c_s ="abc";
string s(c_s);
" i2 @) Z  b) e; S9 Q3 g 3. string转char*
string s ="abc";
char* c;
0 p$ M0 Q8 h$ ]" }constint len = s.length();
5 E# Z2 N6 n) v9 t$ p  e; o7 _3 kc =newchar[len+1];
+ e, n, H+ S% N$ `; xstrcpy(c,s.c_str());

4. char*转string
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* p: T4 S* B. u" Y: e3 l. v* ?! nchar* c ="abc";
string s(c);
# f: }, r2 p- I6 v' N2 E  V 5. const char*转char*
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constchar* cpc ="abc";
1 e* E; \& j8 |8 {9 s& gchar* pc =newchar[100];//足够长
% U# _4 _" R! Mstrcpy(pc,c