package chap1;

import java.io.BufferedReader;
import java.io.FileReader;

public class t1111 {
public static void main(String args[])throws Exception{
 String str=null;
 int total=0;
BufferedReader fr = new BufferedReader(new FileReader("a.txt"));

while((str=fr.readLine()) !=null){
total = total + Integer.parseInt(str); //累加
 System.out.println("total " + total);
}
  
 }
}

---

 

package chap1;

import java.io.BufferedReader;
import java.io.FileReader;

public class t1111 {
public static void main(String args[])throws Exception{
 String str=null;
 int total=0,i=0;
BufferedReader fr = new BufferedReader(new FileReader("a.txt"));

while(i < 11) {
 i=i+1;
total = total + i;
 System.out.println("total= " + total + "\ti="+i);
}
  
 }
}

 
 ---

 

package chap1;

import java.io.BufferedReader;
import java.io.FileReader;

public class t1111 {
public static void main(String args[])throws Exception{
 String str=null;
 int total=0,i=0;
BufferedReader fr = new BufferedReader(new FileReader("a.txt"));

while(i<11) {
total = total + i;
 System.out.println("total= " + total + "\t"+"i="+i);
 i=i+1;
}
 }
}

 --- For迴圈

 

package chap1;

public class t1111 {
public static void main(String args[]){
int total=0;

 for (int i=5; i<101; i=i+5){
   total = total+i; //累加
}
 System.out.println("1+2+3+4+5+6+7+8+9+10="+total);
 }
}

 ---陣列

package chap1;

public class t1111 {
public static void main(String args[]){
 int total = 0;
 int data[]={75,85,100,60,100};
 for (int i=0; i<5; i++){
  System.out.println(data[i]);
 total=total+data[i];
 System.out.println("total="+total);
 }
}}

 
 ------作業

package chap1;

import java.io.BufferedReader;
import java.io.FileReader;

public class t1113 {
 public static void main(String args[]) throws Exception {
  BufferedReader fr = new BufferedReader(new FileReader("data.txt"));
  

  String ss = "";
  int sum = 0;
  int i = 0;

  int[] data = new int[100];

  while ((ss = fr.readLine()) != null) {

   data[i] = Integer.parseInt(ss);

   System.out.println(ss);

   sum = sum + data[i];

   i++;

  }

  System.out.println("\n\n\n" + sum);

 }

}

 

 

 

 

 

 

 

 

 

玥君 發表在 痞客邦 PIXNET 留言(0) 人氣()