#include <stdio.h>

main()
{
    float grade;
    printf("please enter grade:");
    scanf("%f",grade);
    if (grade>= 90)
        printf("you get A+\n");
    else
        if (grade>=85)
        printf("you get A\n");
    elseif (grade>=80);
    printf("you get A-\n");
    elseprintf("you fail\n");
}