C++ での 2 つの変数 A と B の入れ替え

using namespace std;

#include
 
int main()
{
 int a,b,temp;
 
 cost<<"Enter la value de a : ";

 cin>>a;
 cost<<"la value de b : ";

 cin>>b; 
 temp = a;
 a = b;
 b = temp;
 
 cost<<"a:  "<<a<<endl;
 cost<<"b:  "<<b<<endl;
 
 cost << "Tap on a key for continue…" << endl;
 cin.ignore();
 cin.get();
 
 return EXIT_SUCCESS;
}