package dege;


import java.util.Scanner;
public class text1 {


public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("请输入一个数值：");
int a=input,nextInt(); //The method nextInt() is undefined for the type text1

int i=1;
do{
System.out.println("你好，美女！"+i);
i++;

}while(i<=a);

}



}

import java.util.Scanner;
public class Text1 {//注意规范，类名首字母要改成大写啊 Text1

public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("请输入一个数值：");
int a=input.nextInt(); //这里input.nextInt(); 你input后面的符号写错了，应该是. 你写成,号了
int i=1;
do{
System.out.println("你好，美女！"+i);
i++;
}while(i<=a);
}

}

，{:3_46:}

楼主的粗心真厉害！