/*

* @由于个人水平有限, 难免有些错误, 还请指点:

* @Author: cpu_code

* @Date: 2020-09-12 21:44:25

* @LastEditTime: 2020-09-12 21:54:31

* @FilePath: \java\javaAPI\String\charAt_String.java

* @Gitee: [https://gitee.com/cpu_code](https://gitee.com/cpu_code)

* @Github: [https://github.com/CPU-Code](https://github.com/CPU-Code)

* @CSDN: [https://blog.csdn.net/qq_44226094](https://blog.csdn.net/qq_44226094)

* @Gitbook: [https://923992029.gitbook.io/cpucode/](https://923992029.gitbook.io/cpucode/)

*/

package javaAPI.String;

import java.util.Scanner;

public class charAt_String {

public static void main(String[] args){

Scanner sc = new Scanner(System.in);

System.out.println("输入数 :");

String s = sc.nextLine();

int bigCount = 0;

int smallCount = 0;

int numberCount = 0;

for(int i = 0; i < s.length(); i++){

char ch = s.charAt(i);

if(ch >= 'A' && ch <= 'Z'){

bigCount++;

} else if(ch >= 'a' && ch <= 'z'){

smallCount++;

} else if(ch >= '0' && ch <= '9'){

numberCount++;

} else {

System.out.println("字符" + ch + "非法");

}

}

System.out.println("大写字符" + bigCount + "个");

System.out.println("小写字符" + smallCount + "个");

System.out.println("数字字符" + numberCount + "个");

}

}

/*

输入数 :

CpuCode12

大写字符2个

小写字符5个

数字字符2个

*/