include <iostream.h>
int abs (int x)
{
    return x>0 ？x:-x;
}
double abs(double x)
{
    return x>0 ?x:-x;
}
void main ()
{
    cout <<"-10的绝对值是："<<abs(-10) <<endl;
    cout << "-123.45的绝对值是："<< abs(-123.45) <<endl;
}