C++ char*，const char*，string的相互转换

mildcat

C++ char*，const char*，string的相互转换

6 H( v9 q( N) P# F6 Y5 _
$ o$ y# w: k, L+ l1. string转const char*
; v' z0 Q# g, W
: a. j, x2 V% D& h, A0 ?' Astring s ="abc";
consTChar* c_s = s.c_str();
2. const char*转string
   直接赋值即可
5 u4 V& y3 N1 C- S
constchar* c_s ="abc";
string s(c_s);
+ o# f5 o# j8 K& H: Z% } 3. string转char*
8 q$ U) H7 Q8 }7 L6 I  Tstring s ="abc";
* g9 I: n" Q# e3 ~, \! w: hchar* c;
constint len = s.length();
c =newchar[len+1];
strcpy(c,s.c_str());

9 @8 T; Q0 V$ E2 g' ?8 _7 G& e 4. char*转string

char* c ="abc";
) H% e/ N2 [; o' |8 m! ^string s(c);
: k, p# O' L, Y; q+ v 5. const char*转char*
1 q# `9 o# m: h! h& }  J
constchar* cpc ="abc";
1 w0 ^$ ]. s2 b0 h2 B: Z9 Xchar* pc =newchar[100];//足够长
strcpy(pc,c
* A/ x9 W3 q' D$ _+ S# p; o4 [% f