Question

3. 编一程序，从键盘输入一个三位数，求出其逆序数并输出，例如输入123，输出321。

使用c语言

Answer 1

#include<stdio.h>
void main()
{
char num[100],i;
int k=0; //计算数组位数
printf("请输入数组\n");
for(i=0;i<100;i++)
{
scanf("%c",&num[i]);
k++;
if(num[i]=='\n')
{
break; // 当输入回车时退出循环
}
}
for(i=k-2;i>=0;i--)
{
printf("%c ",num[i]);
}

}

Answer 2

#include<stdio.h>
void main()
{
int a[3],a,b;
printf("输入一个三位数");
scanf("%d",&a);
a[0]=a/100;
a[1]=a%100/10;
a[2]=a&10;
b=a[0]+a[1]*10+a[2]*100;
printf("%d",b);
}

Answer 3

Private Sub rank(n As Integer, a() As Long)
For i = 1 To n - 1
tmax = i
For j = i + 1 To n
If a(j) > a(tmax) Then tmax = j
Next j
If tmax <> i Then t = a(i): a(i) = a(tmax): a(tmax) = t
Next i
End Sub