Get average and rank it as shown:

sl.no	average	grade
1	0-39	Fail
2	40-69	good
3	70-80	Very good
4	81-100	Excellent

C Program

#include <stdio.h>
#include <stdlib.h>
int main()
{
    int avg;
    printf("Enter your average:");
    scanf("%d",&avg);
    if(avg>=0 && avg<=39)
        printf("Poor");
    else if(avg>=40 && avg<=69)
        printf("Good");
    else if(avg>=70 && avg<=80)
        printf("Very Good");
    else if(avg>=81 && avg<=100)
        printf("Excellent");
}

Java Program

import java.util.Scanner;

public class Selection {

	public static void main(String[] args)
  {
	Scanner  s = new Scanner(System.in);
    System.out.print("Enter your average:");
	int avg = s.nextInt();
	if(avg>=0 && avg<=39)
           System.out.print("Poor");
           else if(avg>=40 && avg<=69)
           System.out.print("Good");
          else if(avg>=70 && avg<=80)
          System.out.print("Very Good");
           else if(avg>=81 && avg<=100)
          System.out.print("Excellent");
	}
		   
}