這個(gè)兩數(shù)之和怎么變成兩變量值拼接了
import?java.util.Scanner;public?class?Demo03?{ public?static?void?main(String[]?args)?{ Scanner?input=new?Scanner(System.in); System.out.println("請(qǐng)輸入第一個(gè)數(shù)字" ); int?a=?input.nextInt(); System.out.println("請(qǐng)輸入第二個(gè)數(shù)字"); int?b=input.nextInt(); System.out.println("兩數(shù)之和為："+a+"和"+b); System.out.println("兩數(shù)之和為："+a+b); System.out.println("兩數(shù)之積為："+a*b); System.out.println("兩數(shù)之商為："+a/+b); System.out.println("兩數(shù)之模為："+a%b);//求余 }}
2020-03-05
System.out.println()中，你先用了“”+ ...等字符串拼接，在此之后，識(shí)別 + 時(shí)會(huì)將其識(shí)別為“拼接符”（System.out.println()自動(dòng)調(diào)用了toString() ）,此時(shí)想要+繼續(xù)充當(dāng)運(yùn)算符時(shí)，須加上括號(hào)。
2020-02-21
import?java.util.Scanner;public?class?Lemo03?{public?static?void?main(String[]?args)?{?Scanner?input=new?Scanner(System.in);??System.out.println("請(qǐng)輸入第一個(gè)數(shù)字"?);?int?num1=?input.nextInt();?//聲明整型變量num1，輸入一個(gè)數(shù)字，賦值給num1?System.out.println("請(qǐng)輸入第二個(gè)數(shù)字");??int?num2=input.nextInt();??System.out.println("兩數(shù)之分別是："+num1+"和"+?num2);?System.out.println("兩數(shù)之差為："+?(num1?-?num2)?);?System.out.println("兩數(shù)之和為："+?(num1?+?num2)?);?System.out.println("兩數(shù)之積為："+??num1?*?num2??);??System.out.println("兩數(shù)之商為："+??num1?/?num2??);?System.out.println("兩數(shù)之模為："+??num1?%?num2??);//求余}}//加上括號(hào)即可2020-02-21
import java.util.Scanner;
public class Lemo03 {
public static void main(String[] args) {
?Scanner input=new Scanner(System.in);
?
?System.out.println("請(qǐng)輸入第一個(gè)數(shù)字" );
?int num1= input.nextInt();
?//聲明整型變量num1，輸入一個(gè)數(shù)字，賦值給num1
?System.out.println("請(qǐng)輸入第二個(gè)數(shù)字");?
?int num2=input.nextInt();
?
?System.out.println("兩數(shù)之分別是："+num1+"和"+ num2);
?System.out.println("兩數(shù)之差為："+ (num1 - num2) );
?System.out.println("兩數(shù)之和為："+ (num1 + num2) );
?System.out.println("兩數(shù)之積為："+ ?num1 * num2 ?);?
?System.out.println("兩數(shù)之商為："+ ?num1 / num2 ?);
?System.out.println("兩數(shù)之模為："+ ?num1 % num2 ?);//求余
}
}
加上括號(hào)