问题 1012: C语言程序设计教程（第三版）课后习题6.2

import java.util.Scanner;

public class Prog1012 {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

String s = scan.nextLine();

StringBuffer sb = new StringBuffer(s);

char[] ch = sb.toString().toCharArray();

int zm = 0;

int sz = 0;

int kg = 0;

int qt = 0;

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

if (ch[i] >= 'a' && ch[i] <= 'z' || ch[i] >= 'A' && ch[i] <= 'Z')

zm++;

else if (ch[i] >= '0' && ch[i] <= '9')

sz++;

else if (ch[i] == ' ')

kg++;

else

qt++;

}

System.out.println(zm + " " + sz + " " + kg + " " + qt);

}

}