//导包
import java.util.Scanner;
class Demo_17 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("请输入字符串:");
String str = sc.nextLine();
//定义字符数组
char[] arr = str.toCharArray();
//定义计数器
int letterCount = 0;
int digtalCount = 0;
int spaceCount = 0;
int otherCount = 0;
//遍历数组统计个数
for(int i = 0;i<arr.length;i++){
char c = arr[i];
if((c>'a' && c<'z') || (c>'A' && c<'Z')){
letterCount++;
}else if(c>'0' && c<'9'){
digtalCount++;
}else if(c == ' '){
spaceCount++;
}else{
otherCount++;
}
}
System.out.println("letterCount ="+letterCount+" "+"digtalCount ="+digtalCount+" "+"spaceCount ="+spaceCount+" "+"otherCount ="+otherCount);
}
}
