import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class Math {
//参数为需要拆分的字符串 ,以什么符号拆分
//
public static int[] sp(String s,String math){
String[] srr=new String[2];
srr=s.split("math");
int[] irr=new int[2];
//String转换成int 方便运算结果
irr[0]=Integer.parseInt(srr[0]);
irr[1]=Integer.parseInt(srr[1]);
return irr;
}
public static void main(String[] args) throws IOException {
BufferedReader br=new BufferedReader(new FileReader("question.txt"));
BufferedWriter bw=new BufferedWriter(new FileWriter("results.txt"));
String s;
//读取一行，之后判断+-*/是否在字符串中出现，
//调用封装的方法 转换成int[],再进行相应的运算
while((s=br.readLine())!=null){
if(s.indexOf("+")!=0){
int[] irr=sp(s,"+");
bw.write(irr[0]+"+"+irr[1]+"="+(irr[0]+irr[1]));
}else if(s.indexOf("-")!=0){
int[] irr=sp(s,"-");
bw.write(irr[0]+"-"+irr[1]+"="+(irr[0]-irr[1]));
}else if(s.indexOf("*")!=0){
int[] irr=sp(s,"*");
bw.write(irr[0]+"*"+irr[1]+"="+(irr[0]*irr[1]));
}else{
int[] irr=sp(s,"/");
bw.write(irr[0]+"/"+irr[1]+"="+(irr[0]/irr[1]));
}
}
br.close();
bw.flush();
bw.close();
}
}
