C++ char*，const char*，string的相互转换

mildcat

C++ char*，const char*，string的相互转换

$ ?9 b9 x8 A- J' g* G
1. string转const char*

6 b/ B' P) b. O0 p& Xstring s ="abc";
0 K) o% s% A+ s- j  t. PconsTChar* c_s = s.c_str();
$ q2 K, J% c- \- K2. const char*转string
0 u" b5 \, J6 \   直接赋值即可

constchar* c_s ="abc";
: X/ b8 Y( C3 P( w2 i( ?4 Cstring s(c_s);
2 m1 [4 ]! G( A. D 3. string转char*
1 n% ^+ Y; A5 I. O" tstring s ="abc";
char* c;
6 j' n9 L9 ?' K: j  e4 Wconstint len = s.length();
c =newchar[len+1];
strcpy(c,s.c_str());
' h9 R# l+ K) O0 }5 c
) m$ q/ _6 O2 ]: i* f! O 4. char*转string
: l* p5 x! W: f% P
char* c ="abc";
$ C. C* k, U2 I$ t" istring s(c);
5. const char*转char*
4 L4 x$ D* P1 f0 j) D
constchar* cpc ="abc";
4 R. n. K' o! {char* pc =newchar[100];//足够长
strcpy(pc,c