Question

C语言：从键盘输入一个字符,可以是数字、字母或标点符号,对输入的字符进行判断:如果是数字则输出“*is a n

如果是数字则输出“*is a number"(*代表输入的字符)，如果是字母则输出“*is a letter“，如果是其他的字符则输出“*is the other”

Answer 1

#include "stdio.h"
void main()
{
char ch;
scanf("%c",&ch);
if(ch>='0'&&ch<='9')
printf("this is a number\n");
else if((ch>='a' && ch<='z')&&(ch>='A' && ch<='Z'))
printf("this is a letter\n");
else printf("this is the other\n");
}
修改完毕

Answer 2

/********添加注释*****************/
#include<stdio.h>
/*****判断子程序***********/
void panduan(char ch)
{
if(ch >= '0' && ch <= '9')printf("\n%c is a number.\n",ch);
else if((ch>='a' && ch<='z') || (ch>='A' && ch<='Z'))
printf("\n%c is a letter.\n",ch);
else
printf("\n%c is the other. \n",ch);
}
int main(void)
{
printf("\nplease input :\n");
panduan(getchar());
return 0;
}

Answer 3

用if语句嘛，if(ch>'A'||ch<'Z'||ch<'z'||ch>'a'),else if(ch<'0'||>ch'9') else