gistfile1.txt

//某社の某cpp
#include <string>
#include <vector>
typedef struct
{
 std::string str_;
 time_t tim_;
}foo_t;

int FooFunc(void *lhs, void *rhs){ 
 //snip
}

void func()
{
 std::vector<foo_t> fooList;
 //snip
 qsort(fooList.begin(), fooList.size(), sizeof(foo_t), FooFunc);

}