C++ char*，const char*，string的相互转换

mildcat

C++ char*，const char*，string的相互转换


1. string转const char*

  T# o; b; @# \' }: }+ d+ G2 L# L$ f- Pstring s ="abc";
consTChar* c_s = s.c_str();
2. const char*转string
3 o" _6 q$ G: k# C   直接赋值即可
7 D5 O1 C$ w6 O+ W
: M* o3 p" S  Bconstchar* c_s ="abc";
8 N0 @7 F3 X* ~4 T6 Fstring s(c_s);
3. string转char*
string s ="abc";
char* c;
constint len = s.length();
c =newchar[len+1];
strcpy(c,s.c_str());

4. char*转string
' Z" d5 T$ s( J7 Y; M
' w7 k9 O% ?) Z# H) S0 ?* ~char* c ="abc";
string s(c);
$ O& i4 {' k0 @$ B8 \1 @# G 5. const char*转char*

constchar* cpc ="abc";
. x+ U8 k4 |+ i6 K5 o6 @char* pc =newchar[100];//足够长
5 E6 s7 i" d0 x: V6 F8 c5 g4 kstrcpy(pc,c