01 计算字符个数

判断：
	是否还有输入？
		是：
			<String>source接收ABCDEF
			<String>targe接收A
			遍历source
				如果source中与targe有相同字符（忽略大小写）
					num++
		否：
			输出计数

import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner s = new Scanner(System.in);
        String source="";
        String targe;
        char[] ac;
        char temp;
        int num=0;
        while(s.hasNext()){
            source = s.nextLine();
            targe = s.next();
            for(int i=0;i<source.length();i++){
                if (targe.equalsIgnoreCase(String.valueOf(source.charAt(i))))
                    num++;
            }
            System.out.println(num);
        }

    }
}

import java.util.Scanner;
public class Test {
    public static void main(String[] args){
        Scanner s = new Scanner(System.in);
        String all="";
        char one;
        char[] ac;
        char temp;
        int num=0;
        while(!s.hasNext("0")){
            all = s.nextLine();
            one = s.next().charAt(0);
            for (int i=0;i<all.length();i++){
                    if (one==all.charAt(i))
                        num++;
            }
            System.out.println(num);
        }
    }
}