// Sorting 3 Values.  Study the slide 28 and the code in alpha3.cpp
// Run the program, then  A) modify sort3 so it sorts the three variables
// passed to it in main.  then B) modify main to read in 4 values, and
// use repeated calls to sort3 to arrange them in increasing order.
//

void swap(float& x, float& y)
{//  exchanges the values of x , y:
 float temp = x;
 x = y;
 y = temp;
}

// sort3() Place three parameters into numerical order
// IN/OUT: x, y, z are any values. Upon return, they
//      will be in numeric sequence   SEE TEST PLAN

void sort3 (float& x, float& y, float& z)
{

   if (x > y) swap(x,y);
   if (x > z) swap(x,z);
   if (y > z) swap(y,z);


}


// B) After A works, and you can sort 3 values properly, modify main
//    to read in 4 values and sort them by using several calls to sort3
//    SEE TEST PLAN

int main( )


{
    float q,r,s,t;
    cout<<"Enter 3 values: \n";
    cin>>q>>r>>s>>t;
    sort3 (q,r,s);
    sort3 (r,s,t);
    sort3 (q,r,s);
    cout<<"in order:" << q <<" "<< r <<" "<< s <<" "<< t <<" "<< endl;
    return 0;
}