//stu.cpp
#include <iostream>
#include <algorithm>
using namespace std;
typedef struct {
   long sid;
   char name[9];
   string name22;   // C++ string
} Student;
Student x[ ] = {  {3388, "aaaaa", "ABCDE" }, {5566, "ccc", "hello"},
    {4949, "bbb", "bbs"} };
bool operator<(Student a, Student b) {
   cout << ".Less.";
   return b.name22 < a.name22;  
}
bool comp(Student a, Student b) {
   cout << ".comp.";
   return strcmp(a.name, b.name) < 0;
}
void print(Student*y, int n){
   for(int i=0; i<n; ++i) {
     cout << y[i].sid << " " << y[i].name << " " << y[i].name22<<endl;
   }
   cout << endl;
}
int main( ) {
   cout << "\nx:\n"; print(x, sizeof(x)/sizeof(x[0]) );

   sort(x, x + sizeof(x)/sizeof(x[0]) );
   cout << "\nx:\n"; print(x, sizeof(x)/sizeof(x[0]) );

   sort(x, x + sizeof(x)/sizeof(x[0]) , comp);
   cout << "\nx:\n"; print(x, sizeof(x)/sizeof(x[0]) );
   return 0;
}
/***
C:\testc\handouts\STL>g++ stu.cpp
stu.cpp:33:2: warning: no newline at end of file

C:\testc\handouts\STL>a
x:
3388 aaaaa ABCDE
5566 ccc hello
4949 bbb bbs

.Less..Less..Less..Less.
x:
5566 ccc hello
4949 bbb bbs
3388 aaaaa ABCDE

.comp..comp.
x:
3388 aaaaa ABCDE
4949 bbb bbs
5566 ccc hello

*** =====================  ***/