หน้า 27

#include<stdio.h>
#include<conio.h>
char cal_grade(float score);
main()
{
      float s;
      char grade;
      printf("Enter score : ");
      scanf("%f",&s);
     
      grade = cal_grade(s);
      printf("You get %c !!!",grade);
     
      getch();
}
char cal_grade(float s)
{
      char grade;
      if (s>=80)
      {
                 grade = 'A';
      }
      else if (s<80&&s>=70)
      {
                 grade = 'B';
      }
      else if (s<70&&s>=60)
      {
                 grade = 'C';
      }
      else if (s<60&&s>=50)
      {
                 grade = 'D';
      }
      else if (s<50)
      {
                 grade = 'F';
      }
      return(grade);
}