Determine Grade

#include <stdio.h>

int main()
{
    int number;

    printf("Enter the number: ");
    scanf("%d", &number);

    if(number >= 80)
        printf("A+");
    else if(number >= 70)
        printf("A-");
    else if(number >= 60)
        printf("A-");
    else if(number >= 50)
        printf("B");
    else if(number >= 40)
        printf("C");
    else if(number >= 33)
        printf("D");
    else
        printf("F");

    return 0;
}