1:一个程序,显示该程序启动的次数(文件存放路径自己定义)?
2:计算显示用户从键盘输入的一个整数的各个位数的和?.
3:boolean a=false;
boolean b=true;
boolean c=(a&&b)&&(!b);
int result=c==false?1;2;求c的值和result?
真的谢谢了!!!
2:计算显示用户从键盘输入的一个整数的各个位数的和?.
3:boolean a=false;
boolean b=true;
boolean c=(a&&b)&&(!b);
int result=c==false?1;2;求c的值和result?
真的谢谢了!!!
File file=new File("c:\\aaa.txt");
try {
if (file.exists() || file.length() > 0) {
FileInputStream in = new FileInputStream(file);
byte b[] = new byte[ (int) file.length()];
in.read(b);
count = new String(b);
in.close();
} count = String.valueOf(Integer.parseInt(count.trim()) + 1); FileOutputStream out = new FileOutputStream(file);
out.write(count.getBytes());
out.close();
}
catch (NumberFormatException ex) {
ex.printStackTrace();
}
catch (IOException ex) {
ex.printStackTrace();
}
int sum=0;
char c;
try {
while (true) {
c = (char) System.in.read();
if (c == '\n') {
break;
}
str = str + c;
sum = sum + Integer.parseInt(c + "");
}
}
catch (NumberFormatException ex) {
System.out.println("请输入数字");
ex.printStackTrace();
}
catch (IOException ex) {
ex.printStackTrace();
} System.out.println("您输入的是:"+str);
System.out.println("各位数字的和是:"+sum);
顺序应该是这样的!boolean a=false;
boolean b=true;
boolean c=(a&&b)&&(!b);
int result=c==false?1;2;求c的值和result?a&&b=false > !b=false > false&&false=false > boolean c = false;
(c==false)=true > true?1:2 = 1 > int result=1;