text: //
  #include <stdio.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("Stdent has an A grade\n");
  }
  else if(score<A && score>=B)
  {printf("Student has an B grade\n");
  }
  else if(score<B && score>=C){
  printf("Student has an C grade\n");
  }
  else if(score<C && score>=D)
  {printf("Student has an D grade\n");
  }
  else
  {printf("Student has failed the course\n");
  }
  return 0;
  }
  
  