stt20201131602.zip

package stt20201131602; import java.util.Scanner; public class stt20201131602 { public static void main(String[] args){ Scanner in = new Scanner(System.in); System.out.println("请输入两个数字："); double a=in.nextDouble(); double b=in.nextDouble(); double x=0; System.out.println("请输入一个运算符号："); char c=in.next().charAt(0); if(c == '*'){ x = a*b; System.out.println(x); } else if(c == '+'){ x = a+b; System.out.println(x); } else if(c == '/'){ if(b!=0){ x = a/b; System.out.println(x);} else{System.out.println("分母不能等于0");} } else if(c == '-'){ x = a-b; System.out.println(x); } else{System.out.println("符号错误");} } }