import java.util.Scanner;
public class computer{
public static void main(String [] args){
int num1;
int num2;
int v;
char ch;
Scanner input = new Scanner(System.in);
System.out.println("请输入第一个数");
num1=input.nextInt();
System.out.println("请输入第二个数");
num2=input.nextInt();
System.out.println("请输入操作符");
ch = input.next().charAt(0);
switch(ch) {
case '+':
v=num1+num2;
System.out.println("结果是"+v);
break;
case '-':
v=num1-num2;
System.out.println("结果是"+v);
break;
case '*':
v=num1*num2;
System.out.println("结果是"+v);
break;
case'/':
if(num2==0){
System.out.println("被除数不能为零");
}
else{
v=num1/num2;
System.out.println("结果是"+v);
}
break;
default:
break;
}
}
}
错误是
D:\java>javac computer.java
computer.java:1: cannot resolve symbol
symbol : class Scanner
location: package util
import java.util.Scanner;
^
computer.java:8: cannot resolve symbol
symbol : class Scanner
location: class computer
Scanner input = new Scanner(System.in)
^
computer.java:8: cannot resolve symbol
symbol : class Scanner
location: class computer
Scanner input = new Scanner(System.in)
^
3 errors
ClassPath 是 .;C:\j2sdk1.4.2_10\lib\tools.jar;C:\j2sdk1.4.2_10\lib\dt.jar;C:\j2sdk1.4.2_10\bin;C:\j2sdk1.4.2_10\lib\rt.jar;
各位大虾指点阿
public class computer{
public static void main(String [] args){
int num1;
int num2;
int v;
char ch;
Scanner input = new Scanner(System.in);
System.out.println("请输入第一个数");
num1=input.nextInt();
System.out.println("请输入第二个数");
num2=input.nextInt();
System.out.println("请输入操作符");
ch = input.next().charAt(0);
switch(ch) {
case '+':
v=num1+num2;
System.out.println("结果是"+v);
break;
case '-':
v=num1-num2;
System.out.println("结果是"+v);
break;
case '*':
v=num1*num2;
System.out.println("结果是"+v);
break;
case'/':
if(num2==0){
System.out.println("被除数不能为零");
}
else{
v=num1/num2;
System.out.println("结果是"+v);
}
break;
default:
break;
}
}
}
错误是
D:\java>javac computer.java
computer.java:1: cannot resolve symbol
symbol : class Scanner
location: package util
import java.util.Scanner;
^
computer.java:8: cannot resolve symbol
symbol : class Scanner
location: class computer
Scanner input = new Scanner(System.in)
^
computer.java:8: cannot resolve symbol
symbol : class Scanner
location: class computer
Scanner input = new Scanner(System.in)
^
3 errors
ClassPath 是 .;C:\j2sdk1.4.2_10\lib\tools.jar;C:\j2sdk1.4.2_10\lib\dt.jar;C:\j2sdk1.4.2_10\bin;C:\j2sdk1.4.2_10\lib\rt.jar;
各位大虾指点阿
* @since 1.5
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String str = br.readLine();