pta_【CPP0037】利用类模板解决绝对值功能

#include <iostream>
using namespace std;

template <class T>
class Absolute
{
private:
T num;
public:
Absolute(T n)
{
num = n;
}
T getValue() const
{
if(num == 0)
return 0;
return num > 0 ? num : -num;
}
};

int main(void){
char c='\0';
int i=0;
long l=0;
scanf("%c%d%ld",&c,&i,&l);
float f=1.1;
double d=2.2;
scanf("%f%lf",&f,&d);
Absolute<char> dc(c);
cout<<dc.getValue()<<endl;
Absolute<int> di(i);
cout<<di.getValue()<<endl;
Absolute<long> dl(l);
cout<<dl.getValue()<<endl;
Absolute<float> df(f);
cout<<df.getValue()<<endl;
Absolute<double> dd(d);
cout<<dd.getValue()<<endl;
return 0;
}