1133-C/C++经典程序训练3---模拟计算器-JAVA

亦凉 2021-09-27 13:30 210阅读 0赞

### C/C++经典程序训练3---模拟计算器 ###

Time Limit: 1000 ms Memory Limit: 8192 KiB

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Problem Description

简单计算器模拟：输入两个整数和一个运算符，输出运算结果。

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Input

第一行输入两个整数，用空格分开；  
第二行输入一个运算符（+、-、\*、/)。  
所有运算均为整数运算，保证除数不包含0。

Output

输出对两个数运算后的结果。

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Sample Input

30 50
    *

Sample Output

1500

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Hint

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Source

import java.util.*;
    
    public class Main {
    
    	public static void main(String[] args) {
    		Scanner scanner = new Scanner(System.in);
    		int a = scanner.nextInt();
    		int b = scanner.nextInt();
    		String c = scanner.next();
    		char m = c.charAt(0);
    		if (m == '+') {
    			System.out.println(a + b);
    		} else if (m == '-') {
    			System.out.println(a - b);
    		} else if (m == '*') {
    			System.out.println(a * b);
    		} else if (m == '/') {
    			System.out.println(a / b);
    		} else {
    			return;
    		}
    	}
    }

import java.util.*;
    
    class Calculate {
    	int a, b;
    
    	public Calculate(int a, int b) {
    		this.a = a;
    		this.b = b;
    	}
    
    	int add() {
    		return a + b;
    	}
    
    	int less() {
    		return a - b;
    	}
    
    	int multiply() {
    		return a * b;
    	}
    
    	int except() {
    		return a / b;
    	}
    }
    
    public class Main {
    
    	public static void main(String[] args) {
    		Scanner scanner = new Scanner(System.in);
    		while (scanner.hasNext()) {
    			int a = scanner.nextInt();
    			int b = scanner.nextInt();
    			String string = scanner.next();
    			char c = string.charAt(0);
    			Calculate calculate = new Calculate(a, b);
    			switch (c) {
    			case '+':
    				System.out.println(calculate.add());
    				break;
    			case '-':
    				System.out.println(calculate.less());
    				break;
    			case '*':
    				System.out.println(calculate.multiply());
    				break;
    			case '/':
    				System.out.println(calculate.except());
    				break;
    			default:
    				break;
    			}
    		}
    	}
    }