C语言程序设计教程（第三版）课后习题6.2 （Java代码）

解题思路:





注意事项:





参考代码:

import java.util.Scanner;

public class C1012 {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

while (scanner.hasNext()) {

String s = scanner.nextLine();

function(s);

}

scanner.close();

}

private static void function(String s) {

int letter = 0;

int number = 0;

int space = 0;

int other = 0;

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

if((s.charAt(i) >= 'a' && s.charAt(i) <= 'z') || (s.charAt(i) >= 'A' && s.charAt(i) <= 'Z')){

letter++;

}else if(s.charAt(i) >= '0' && s.charAt(i) <= '9'){

number++;

}else if(s.charAt(i) == ' '){

space++;

}else{

other++;

}

}

System.out.println(letter + " " + number + " " + space + " " + other);

}

}