字符类型判断

题目内容：
从键盘键入任意一个字符，判断该字符是英文字母（不区分大、小写）、数字字符还是其它字符。
若键入字母，则屏幕显示 It is an English character.；若键入数字则屏幕显示It is a digit character. ；若输入其它字符，则屏幕显示：It is other character.
程序的运行示例1：
Input simple:
b↙
It is an English character.

程序的运行示例2：
Input simple:
6↙
It is a digit character.

程序的运行示例3：
Input simple:
*↙
It is other character.

程序的运行示例4：
Input simple:
A↙
It is an English character.

输入信息提示：”Input simple: ”
输入格式: “%c”
输出格式：
英文字符的输出格式：”It is an English character. ”
数字的输出格式：”It is a digit character. ”
其它字符的输出格式：”It is other character. ”

#include <stdio.h>
#include <ctype.h>

int main()
{
    printf("Input simple:
");
    char ch;
    ch=getchar();
    if(isalpha(ch))printf("It is an English character.
");
    else if(isalnum(ch))printf("It is a digit character.
");
    else printf("It is other character.
");
    return 0;
}

#include<stdio.h>

int main(){
    char c;
    printf("Input simple:");
    scanf("%c",&c);
    if(c>="a"&&c<="z"||c>="A"&&c<="Z") printf("It is an English character.");
    else if(c>="0"&&c<="9") printf("It is a digit character.");
    else printf("It is other character.");
    return 0;
}