/**/

#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 a A grade\n");}
else if(score >= B){printf("Student has a B grade\n");}
else if(score >= C){printf("Student has a C grade\n");}
else if(score >= D){printf("Student has a D grade\n");}
else{printf("Student has failed the course\n");}

return (0);
}