一：字符指针
int main()
{
void charsort2(char ** ,char **);
char * s1="abc";
char * s2="baihe";
charsort2 (&s1,&s2);
cout<<s1<<endl;
cout<<s2<<endl;
return 0;
}
void charsort2(char **s1,char **s2)
{
char *p;
p=*s1;
*s1=*s2;
*s2=p;
}
二：字符数组
int main()
{
void charsort( char * ,char * );
char s1[7]="abc";
char s2[7]="baihe";
charsort(s1,s2);
cout<<s1<<endl;
cout<<s2<<endl;
return 0;
}
void charsort(char *s1,char *s2)
{
char p[7];
strcpy(p,s1);
strcpy(s1,s2);
strcpy(s2,p);
}
三：字符串
int main()
{
void strsort(string *,string *);
string s1="abc";
string s2="baihe";
strsort(&s1,&s2);
cout<<s1<<endl;
cout<<s2<<endl;
return 0;
}
void strsort(string *s1,string *s2)
{
string p;
p=*s1;
*s1=*s2;
*s2=p;
}
四：引用
int main()
{
void strsort(string &,string &);
string s1="abc";
string s2="baihe";
strsort(s1,s2);
cout<<s1<<endl;
cout<<s2<<endl;
return 0;
}
void strsort(string & s1,string &s2)
{
string p;
p=s1;
s1=s2;
s2=p;
}
