/**/
#include <stdio.h>
#include <math.h>
int main(){
float a, b, c, d, score; 
printf("Enter thresholds for A, B, C, D\n");
printf("in that order, decreasing percentages > ");
scanf("%f%f%f%f", &a, &b, &c, &d);
printf("Thank you. Now enter student score (percent) >");
scanf("%f", &score);
if (score >= a)
	printf("Student has an A grade\n");
else if (score >= b)
	printf("Student has an B grade\n");
else if (score >= c)
	printf("Student has an C grade\n");
else if (score >= d)
	printf("Student has an D grade\n");
return 0;}