C++ char*，const char*，string的相互转换

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C++ char*，const char*，string的相互转换

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, r& c( T  L% Q$ j3 e1. string转const char*
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1 Q( o; e* B! N: {0 ustring s ="abc";
# I% i/ W; u4 _+ z) n+ u' o  r+ fconsTChar* c_s = s.c_str();
2. const char*转string
8 k  T2 v; T$ x9 A   直接赋值即可
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constchar* c_s ="abc";
string s(c_s);
: n, P& _/ |. l3 x 3. string转char*
: O1 M$ m: n3 c2 ystring s ="abc";
( g! n9 z- _1 ]0 F/ z0 m# [3 y& ^char* c;
9 B; ]8 Q. m6 h3 \" _constint len = s.length();
5 ^; [/ }9 Y" l# Qc =newchar[len+1];
strcpy(c,s.c_str());

4. char*转string
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- {5 z; Z9 c& p0 D3 f6 e8 O4 X) Rchar* c ="abc";
string s(c);
5. const char*转char*
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constchar* cpc ="abc";
# _/ \/ U5 Y" @/ r3 @char* pc =newchar[100];//足够长
strcpy(pc,c

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