解题思路:
注意事项:
参考代码:
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner=new Scanner(System.in); String n=scanner.nextLine(); char[] ns=n.toCharArray(); int a=0,b=0,c=0,d=0; for (int i = 0; i < ns.length; i++) { if (ns[i]<='z'&&ns[i]>='a'||ns[i]<='Z'&&ns[i]>='A') { a++; }else if (ns[i]<='9'&&ns[i]>='0') { b++; }else if (ns[i]==' ') { c++; }else { d++; } } System.out.println(a+" "+b+" "+c+" "+d); } }
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