[英]Need help in my java calculator
我最近开始学习Java,并尝试对计算器进行编程,但是它给了我错误(而且我不明白为什么会这样)。
PS:对不起,我英语不好
package pkg2;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner reader = new Scanner(System.in);
System.out.println("Write a number: ");
int first = reader.nextInt();
System.out.println("Write another number: ");
int second = reader.nextInt();
System.out.println("Write an operator: ");
char operator = reader.nextInt();
if(operator == '+') {
System.out.println(first + second);
}
else if(operator == '-') {
System.out.println(first - second);
}
else if(operator == '*') {
System.out.println(first * second);
}
else if(operator == '/') {
System.out.println(first / second);
}
}
}
错误是:
当提示您输入运算符时,您正在尝试读取int而不是char。 这是您应该如何做:
package pkg2;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner reader = new Scanner(System.in);
System.out.println("Write a number: ");
int first = reader.nextInt();
System.out.println("Write another number: ");
int second = reader.nextInt();
System.out.println("Write an operator: ");
char operator = reader.next().charAt(0);
if(operator == '+') {
System.out.println(first + second);
}
else if(operator == '-') {
System.out.println(first - second);
}
else if(operator == '*') {
System.out.println(first * second);
}
else if(operator == '/') {
System.out.println(first / second);
}
}
}
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