Q.Write a C program to accept a letter for the grade obtained by the student and display the corresponding remark. The letter grade and the corresponding remarks are listed in the table (A - BEST, B - VERY GOOD, C - FAIR, D - ABSENT, E - FAIL). The textbook presents this worked program, transcribed exactly as printed (including its printed errors):

#include<stdio.h>  
#include<string.h>  
#include<ctype.h>  
void main()  
{  
char remark[12];   /*remark is an array of 12 chars*/  
char grade;  
printf("Enter the grade\n");  
scanf("%c", &grade);  
/*Lower case letter to upper case*/  
grade=to upper(grade);  
switch(grade)  
    {  
    Case 'A' : strcpy (remark, "BEST");  
            break;  
    Case 'B' : strcpy (remark, "VERY GOOD");  
            break;  
    Case 'C' : strcpy (remark, "FAIR");  
            break;  
    Case 'D' : strcpy (remark, "ABSENT");  
            break;  
    Case 'F' : strcpy (remark, "FAILS");  
            break;  
    }  
    /*End of switch*/  
    Printf("RESULT; %s\n", remark);  
}  
    /*End of main()*/  

Sample output printed in the textbook:

Run1                 Run2  
Enter the grade      Enter the grade  
B                    G  
RESULT : VERY GOOD   RESULT : ERROR IN GRADE