Заменить сортировку пузырьком на прямым выбором

#include <conio.h>
#include <iostream>
#include <stdlib.h>
 
using namespace std;
 
struct schet
{ 
char name[5];
char valuta[6];
double summa;
double stavka;
};
 
int main(){
char w[7] = "dollar";
char q[5] = "euro";
char z[6] = "ruble";
int i,j,n=0;
cout << "Vvedite n: ";
while(!(cin >> n))
{
cin.clear();
if(cin.get() != '\0')
cout << "\n Oshibka vvoda!\n";
cout << "Vvedite n: ";
}
struct schet *a=new struct schet[n];
struct schet b;
 
for ( i=0;i<n;i++)
{ cout << "\nVvedite nazvanie: " ;
cin >> a[i].name; 
cout << "Vvedite summu: ";
while(!(cin >> a[i].summa))
{
cin.clear();
if(cin.get() != '\0')
cout << "\n Oshibka vvoda!\n";
cout << "Vvedite summu: ";
}
cout << "Vvedite valutu: ";
 
while(1)
{cin >> a[i].valuta;
if ((strcmp(a[i].valuta,z)==0) || (strcmp(a[i].valuta,w)==0) || (strcmp(a[i].valuta,q)==0))
{break;}
else 
{ 
cout << "\nNet takoi valuti!\n";
cout << "Vvedite valutu: ";
}
}
 
cout << "Vvedite stavku: ";
while(!(cin >> a[i].stavka))
{
cin.clear();
if(cin.get() != '\0') 
cout << "Oshibka vvoda!\n";
cout << "Vvedite stavku: ";
}
 
}
 
for (i=0;i<(n-1);i++)
{ 
 
for (j=i+1;j<n;j++)
{
if (a[j].summa<a[i].summa)
{ 
swap(a[j],a[i]);}
}
 
}
 
 
 
cout <<" Nazvanie Valuta Summa Stavka\n";
for (i=0;i<n;i++)
{
cout << i+1 <<"-vklad: " << a[i].name <<" ";
cout << a[i].valuta <<" ";
cout << a[i].summa<< " ";
cout << a[i].stavka<< "\n";
}
 
_getch();
return 0;}