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//import java.util.*;
public class Test {
public static void main(String[] args) {
// TODO Auto-generated method stub
if(args.length < 3) System.exit(1);
char ch = args[0].charAt(0);
int a = ch - '0';
ch = args[2].charAt(0);
int b = ch - '0';
ch = args[1].charAt(0);
System.out.println(ch);
switch(ch){
case '+':System.out.println(a + ch + b + "=" + (a + b ));break;
case '-':System.out.println("a - b = " + (a - b ));break;
case '*':System.out.println("a * b = " + (a * b ));break;//乘法输出的不正确,其他的正确
case '/':System.out.println("a / b = " + (a / b ));break;
default:System.out.println("wrong char");
}
}
}