小学数学

import java.util.*;import java.text.ParseException;import java.text.SimpleDateFormat;public class Main {public static void main(String[] args) throws ParseException {// TODO Auto-generated method stubScanner cin = new Scanner(System.in);int flag = 0;while (cin.hasNext()) {int f = 0;String str = cin.next();for (int i = 0; i < str.length(); i++) {char ch = str.charAt(i);if (ch == '+') {f = 1;}if (ch == '-') {f = 2;}}String str1[] = str.split("\\+|\\-|\\=|\\?");// 用字符串数组存起来//System.out.println(str1.length);int count = str1.length;if (count == 3) {int a = Integer.parseInt(str1[0]);// parseInt后面加String类型int b = Integer.parseInt(str1[1]);int c = Integer.parseInt(str1[2]);if (f == 1) {if (a + b == c) {flag++;//System.out.println(flag);}}if (f == 2) {if (a - b == c) {flag++;}}}}System.out.println(flag);}}