C :

#include<stdio.h>
int main()
{
    int n,i;
    scanf("%d",&n);//需要判断的成绩个数
    for(i=1;i<=n;i++)
    {
    int t;
    scanf("%d",&t);
   if(t>=90&&t<=100)
        printf("A\n");
   else if(t>=80&&t<=89)
             printf("B\n");
   else if(t>=70&&t<=79)
            printf("C\n");
   else if(t>=60&&t<=69)
    printf("D\n");
   else if(t>=0&&t<=59)
    printf("E\n");
   else  if(t>100)
    printf("Score is error!");

    }
    return 0;
}

C++ :

#include <stdio.h>

int main(){
    int n, k;
    int kcase;
    scanf("%d",&kcase);
    while(kcase--){
        scanf("%d", &n);
        if(n < 0 || n >100)
            printf("Score is error!\n");
        else{
            k = n / 10;
            switch(k){
            case 10: printf("A\n"); break;
            case 9: printf("A\n"); break;
            case 8: printf("B\n"); break;
            case 7: printf("C\n"); break;
            case 6: printf("D\n"); break;
            default: printf("E\n"); break;
            }
        }
    }
    return 0;
}

Pascal :

var a:array[1..1000] of longint;
    n,i:longint;
begin
 readln(n);
 for i:=1 to n do
  read(a[i]);
 for i:=1 to n do
  begin
   if (a[i]>100)  or (a[i]<0) then
    begin
     writeln('Score is error!');
     break;
    end;
   case a[i] of
    90..100:writeln('A');
    80..89:writeln('B');
    70..79:writeln('C');
    60..69:writeln('D');
    0..59:writeln('E');
   end;
  end;
end.

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input=new Scanner(System.in);
		int N=input.nextInt();
		int []a=new int[N];
		for (int i = 0; i < a.length; i++) {
			a[i]=input.nextInt();
		}
		for (int i = 0; i < a.length; i++) {		
			if(a[i]>=0&&a[i]<=59) {
				System.out.println("E");
			}else if(a[i]>59&&a[i]<=69) {
				System.out.println("D");
			}else if(a[i]>69&&a[i]<=79) {
				System.out.println("C");
			}else if(a[i]>79&&a[i]<=89) {
				System.out.println("B");
			}else if(a[i]>89&&a[i]<=100) {
				System.out.println("A");
			}else {
				System.out.println("Score is error!");
			}
		}
	}
}