산술연산자 | 총점 구하기[JAVA 자바]

총점구하기

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Java Documentation Java Java SE API Documentation 자바 라이브러리 https://docs.oracle.com/en/java/javase/14/docs/api/index.html

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http://www.apache.org/ Apache Project List

 

Apache Tomcat - Servlet 4.0 Javadocs

http://tomcat.apache.org/tomcat-9.0-doc/servletapi/index.html

 

Scanner scan = new Scanner(System.in); 숫자입력 문자입력

package testPkg5;

import java.util.*;

public class TestCls2 {//0420
	public static void main(String[] args) {
//		int value=5;
//		
//		value*=2;
//		System.out.println(value);
//		
//		value*=2;
//		System.out.println(value);
//		
//		value=value+2;
//		System.out.println(value);
		
		Scanner scan = new Scanner(System.in); // 입력받을변수 
		
		int kor=0;
		int eng=0;
		int math=0;
		int total=0;
		
		System.out.println("국어 점수입력:");
		kor=scan.nextInt();
		total+=kor; //total = total+kor;
		
		
		
		System.out.println("영어 점수입력:");
		eng=scan.nextInt();
		total+=eng;
		
		System.out.println("수학 점수입력:");
		math=scan.nextInt();
		total+=math;
		
		System.out.println("총점은:"+total);
		


		
		
	}
}

 

산술연산자

package testPkg5;

import java.util.*; //JRE Sydtem Library안에 java.base안에 Util 에 있음
public class TestCls {
	public static void main(String[] args) {
		
		Scanner scan = new Scanner(System.in); //키보드 입력받을 준비
		
		//저장공간을 만들고
		int value1 = 0;
		int value2 = 0;
		float fix = 0.0f;
		
		//초기값 설정
		value1 = 100;
		value2 = 150;
		
		//결과값
		int result =0;
		
		result=value1+value2;
		System.out.println(value1+"+"+value2+"="+result);

		
		System.out.println("숫자입력");
		value1 = scan.nextInt();	
		System.out.println("두번째숫자입력");
		value2 = scan.nextInt();
		
		result=value1*value2;			
		System.out.println("곱한 결과만"+result+"입니다");
		
		System.out.println("숫자입력");
		value1 = scan.nextInt();	
		System.out.println("두번째숫자입력");
		value2 = scan.nextInt();	
		
		result=value1%value2;		
		System.out.println(value1+"을"+value2+"로 나눈 나머지는 "+result+"입니다");

	}
}

 

증감연산자 (전위,후위)

package testPkg6;

public class TestCls {
	public static void main(String[] args) {
		
		int value=0;
		
		value++;
		System.out.println(value); //0+1
		
		++value;
		System.out.println(value); //1+1
		
		value--;
		System.out.println(value);
		
		--value;
		System.out.println(value);
		
		
	}
}

//증감연산자 (전위,후위)
package testPkg7;
//전위연산은 먼저 변수값을 증가시키고 계산

public class TestCls {
	public static void main(String[] args) {
		
		int value=5;
		int sum = 0;
		
		sum = value++ + 10;
		System.out.println(value+","+sum);
		
		sum=++value +10;
		System.out.println(value+","+sum);
		
		sum=value-- +10;
		System.out.println(value+","+sum);
		
		sum=--value +10;
		System.out.println(value+","+sum);
		
		
		
	}
}