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*

string s ="abc";
9 V; \3 m& B' E6 r8 [consTChar* c_s = s.c_str();
2. const char*转string
   直接赋值即可
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0 c0 C/ l4 |; [/ x0 xconstchar* c_s ="abc";
. L' e& X' d4 [; Q$ B, d5 [" Wstring s(c_s);
3. string转char*
/ c. h' o3 W! B7 astring s ="abc";
' \3 Q( J1 Q" _4 i2 X3 f3 G, Y" kchar* c;
constint len = s.length();
c =newchar[len+1];
( M$ |+ h1 l& \: O; o  g# Y6 Sstrcpy(c,s.c_str());

4. char*转string
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2 f& f# A/ x( \/ S; h; S% \* \char* c ="abc";
string s(c);
5. const char*转char*

/ l/ \% J" o# C7 E) E; |constchar* cpc ="abc";
) [: b. a( F" g4 pchar* pc =newchar[100];//足够长
( g( L2 q7 T( l! n9 z) Ostrcpy(pc,c
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