text: //
  //
  #include<stdio.h>
  
  int main(){
  
    float grade1, grade2, grade3, grade4, score;
  
    printf( "Enter thresholds for A, B, C, D\n" );
    printf( "in that order, decreasing percentages > " );
    scanf( "%f %f %f %f", &grade1, &grade2, &grade3, &grade4 );
    printf( "Thank you. Now enter student score (percent) > " );
    scanf( "%f", &score );
  
    if( score >= grade1 )
      printf( "Student has an A grade\n" );
    else if( score >= grade2 && score < grade1 )
      printf( "Student has a B grade\n" );
    else if( score >= grade3 && score < grade2 )
      printf( "Student has a C grade\n" );
    else if( score >= grade4 && score < grade3 )
      printf( "Student has a D grade\n" );
    else
      printf( "Student has failed the course.\n" );
  
    return 0;
  }
  