C二级辅导-统计字符 （Java代码）

解题思路:





注意事项: ' ' 号的使用





参考代码:

import java.util.Scanner;

public class Main{

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

String s = sc.nextLine();

int letter = 0, number = 0, blank = 0, other = 0;

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

char c = s.charAt(i);

if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {

letter++;

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

number++;

} else if (c == ' ') {

blank++;

}

else {

other++;

}

}

System.out.println(letter);

System.out.println(blank);

System.out.println(number);

System.out.println(other);

}

}