void main() {
	double A; 
	double B; 
	double copie;	// copie de A
	A = readDouble( "A : " ); 
	B = readDouble( "B : " ); 
	copie = A;
	A = B;
	B = copie;
	println( "A : " + A ); 
	println( "B : " + B ); 
}