c++ cstring排序源碼

#include<string>

#include<iostream>

using namespace std;

struct string3

{

string str1;

string str2;

string str3;

string3(const char* s1,const char* s2,const char* s3):

str1(s1),

str2(s2),

str3(s3)

{};

};

bool scom(string3 lhs,string3 rhs)

{

if (lhs.str1!=rhs.str1)

return lhs.str1<rhs.str1;

if (lhs.str2!=rhs.str2)

return lhs.str2<rhs.str2;

return lhs.str3<rhs.str3;

};

int main()

{

vector<string3> vs;

string3 tmp("sdfsd","2316","4587");

vs.push_back(tmp);

tmp.str1="PPPP";

vs.push_back(tmp);

tmp.str3="3333";

vs.push_back(tmp);

tmp.str2="0000";

vs.push_back(tmp);

vector<string3>::iterator iter;

cout<<"排序前："<<endl;

for(iter=vs.begin();iter!=vs.end();++iter)

cout<<(*iter).str1<<"\t"<<(*iter).str2<<"\t"<<(*iter).str3<<"\t"<<endl;

sort(vs.begin(),vs.end(),scom) ;

cout<<"排序後："<<endl;

for(iter=vs.begin();iter!=vs.end();++iter)

cout<<(*iter).str1<<"\t"<<(*iter).str2<<"\t"<<(*iter).str3<<"\t"<<endl;

return 0;

}