43.编写一个程序，判断用户输入的字符是否是数字，若是数字，则输出“a numerical character”

//1、学习到字符输入
//2、判断字符

#include<iostream>
using namespace std;

int main()
{
    char a;
    cout<<"please input a charcter: "<<endl;
    cin>>a;


    if(a>'0'&&a<'9')
    {
        cout<<"it's a numerical character!"<<endl;
    }else
    {
        cout<<"it's not a numerical character!"<<endl;
    }
    return 0;
}