#include <iostream>
#include <stdio.h>
using namespace std;
template <class T>
class Absolute{
private:
T x;
public:
T getValue(void)const;
Absolute(T xx){x=xx;}
};
template <class T>
T Absolute<T>::getValue()const
{
if(x<0) return 0-x;
else return x;
}
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;
}
运行截图如下: