easy
计算字符个数
http://www.nowcoder.com/questionTerminal/a35ce98431874e3a820dbe4b2d0508b1
import java.util.Scanner;
public class Main{
public static void main(String[] args){
Scanner scanner = new Scanner(System.in);
String str = scanner.nextLine().toLowerCase();
Character c = scanner.nextLine().charAt(0);
Character.toLowerCase(c);
int count = 0;
for(int i = 0; i < str.length(); i++){
if(c == str.charAt(i)){
count++;
}
}
System.out.println(count);
}
}