C二级辅导-统计字符 （Java代码）

解题思路:





注意事项:





参考代码:

import java.util.*;

public class liusan {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String a = sc.nextLine();
int letter = 0, number = 0, blank = 0, els = 0;
for (int i = 0; i < a.length(); i++) {
char m = a.charAt(i);
if (m == ' ') {
blank++;
} else if (m >= 'a' && m <= 'z' || m >= 'A' && m <= 'Z') {

letter++;
} else if (m >= '0' && m <= '9') {
number++;
} else {
els++;
}
}
System.out.println(letter+"\n"+blank+"\n"+number+"\n"+els);
}
}