public class CSDNTest { public static void main(String[] args) { // TODO Auto-generated method stub Scanner scanner=new Scanner(System.in); int[] allNum=new int[20]; for(int i=0;i<20;i++) { System.out.println("输入第"+(i+1)+"个元素"); allNum[i]=scanner.nextInt(); } System.out.println("输入指定元素"); int x=scanner.nextInt();
for (int i = 0; i < allNum.length; i++) { int j = allNum[i]; if (j==x) { System.out.println(x+"的下标为"+i); return; } } System.out.println("指定元素不再之前的20个元素中"); }}
// TODO Auto-generated method stub
Scanner scanner=new Scanner(System.in);
int[] allNum=new int[20];
for(int i=0;i<20;i++) {
System.out.println("输入第"+(i+1)+"个元素");
allNum[i]=scanner.nextInt();
}
System.out.println("输入指定元素");
int x=scanner.nextInt();
for (int i = 0; i < allNum.length; i++) {
int j = allNum[i];
if (j==x) {
System.out.println(x+"的下标为"+i);
return;
}
}
System.out.println("指定元素不再之前的20个元素中");
}}