Question

输入一个整数,编程求他的十位数是怎样输出的(用c++)

Answer 1

(n/10)%10
或
(n%100)/10

Answer 2

#include <iostream.h>
void main(){
int a,b,i;
cout<<"请输入整数"<<endl;
cin>>i;
a=i%100;
b=a%10;
i=(a-b)/10;
cout<<"该数的十位为"<<i<<endl;

}

Answer 3

就十位数么:
int n;
cin>>n;
cout<<(n/10)%10<<endl;