첫번째 숫자로부터 두번째 숫자의 사이의 모둔 짝수의 합을 구하시오!
// Exercise 3-1
import java.io.*;
class Exercise1
{
public static void main (String[] args) throws IOException
{
BufferedReader stdin =
new BufferedReader(new InputStreamReader(System.in));
String str;
int iNum1;
int iNum2;
int iCnt;
int iSum=0;
System.out.print("Enter first Number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Enter Second Number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
for(iCnt=iNum1; iCnt <= iNum2; iCnt++)
{
if((iCnt%2) == 0)
{
iSum+=iCnt;
}
}
System.out.print("the sum of even between
first numver and second number : " + iSum);
}
}
import java.io.*;
class Exercise1
{
public static void main (String[] args) throws IOException
{
BufferedReader stdin =
new BufferedReader(new InputStreamReader(System.in));
String str;
int iNum1;
int iNum2;
int iCnt;
int iSum=0;
System.out.print("Enter first Number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Enter Second Number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
for(iCnt=iNum1; iCnt <= iNum2; iCnt++)
{
if((iCnt%2) == 0)
{
iSum+=iCnt;
}
}
System.out.print("the sum of even between
first numver and second number : " + iSum);
}
}
구구단을 출력하라!
// Exercise 3-2
import java.io.*;
class Exercise2
{
public static void main (String[] args)
{
int iCnt1;
int iCnt2;
int iSum;
for(iCnt1=1; 10 > iCnt1; ++iCnt1)
{
for(iCnt2=2; 10 > iCnt2; ++iCnt2)
{
iSum=iCnt1*iCnt2;
System.out.print(iCnt2 + "*");
System.out.print(iCnt1 + "=" + iSum + "\t");
}
System.out.println();
}
}
}
import java.io.*;
class Exercise2
{
public static void main (String[] args)
{
int iCnt1;
int iCnt2;
int iSum;
for(iCnt1=1; 10 > iCnt1; ++iCnt1)
{
for(iCnt2=2; 10 > iCnt2; ++iCnt2)
{
iSum=iCnt1*iCnt2;
System.out.print(iCnt2 + "*");
System.out.print(iCnt1 + "=" + iSum + "\t");
}
System.out.println();
}
}
}
계산기 프로그램으로 해당 결과를 출력하는 프로그램을 만드시오!
// Exercise 3-3
import java.io.*;
class Exercise3
{
public static void main (String[] args) throws IOException
{
BufferedReader stdin =
new BufferedReader(new InputStreamReader(System.in));
String str;
int iSelect;
int iNum1;
int iNum2;
do{
System.out.println("Choise one of the following operations!");
System.out.println("\t1. Add \n\t2. Sub \n\t3. Mul
\n\t4. Div \n\t5. Quit");
System.out.print("Choise : ");
str = stdin.readLine();
iSelect = Integer.parseInt(str);
switch(iSelect)
{
case 1:
System.out.print("Input first number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Input second number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
System.out.println("Result : " + (iNum1 + iNum2));
break;
case 2:
System.out.print("Input first number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Input second number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
System.out.println("Result : " + (iNum1 - iNum2));
break;
case 3:
System.out.print("Input first number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Input second number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
System.out.println("Result : " + (iNum1 * iNum2));
break;
case 4:
System.out.print("Input first number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Input second number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
System.out.println("Result : " + (double)(iNum1/iNum2));
break;
}
} while(iSelect != 5);
}
}
import java.io.*;
class Exercise3
{
public static void main (String[] args) throws IOException
{
BufferedReader stdin =
new BufferedReader(new InputStreamReader(System.in));
String str;
int iSelect;
int iNum1;
int iNum2;
do{
System.out.println("Choise one of the following operations!");
System.out.println("\t1. Add \n\t2. Sub \n\t3. Mul
\n\t4. Div \n\t5. Quit");
System.out.print("Choise : ");
str = stdin.readLine();
iSelect = Integer.parseInt(str);
switch(iSelect)
{
case 1:
System.out.print("Input first number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Input second number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
System.out.println("Result : " + (iNum1 + iNum2));
break;
case 2:
System.out.print("Input first number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Input second number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
System.out.println("Result : " + (iNum1 - iNum2));
break;
case 3:
System.out.print("Input first number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Input second number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
System.out.println("Result : " + (iNum1 * iNum2));
break;
case 4:
System.out.print("Input first number : ");
str = stdin.readLine();
iNum1 = Integer.parseInt(str);
System.out.print("Input second number : ");
str = stdin.readLine();
iNum2 = Integer.parseInt(str);
System.out.println("Result : " + (double)(iNum1/iNum2));
break;
}
} while(iSelect != 5);
}
}