/* grades.c
 * converts a number grade to a letter grade
 * utilizing switches.
 * 
 * King Chapter 5, Ex. 10.
 * 
 * By Cory Spitzer
 * March 14th, 2013
 * 
 * 
 */

#include <stdio.h>
#include <string.h>

int main(){
    int grade = 0;
    
    printf("grades.c \n");
    printf("converts a number grade to a letter grade \n");
    
    printf("Enter a integer from 0 to 99 inclusive \n");
    // Get the first digit of the number
    grade = getchar(); // equivalent to getc(stdin)
    grade -= 5;
    if (grade < 0) {
        grade = 0;
    }
        
    switch (grade) {
        case 0:       // 0-59
            printf("F \n"); 
            break;
        case 1:       //60-69
            printf("D. \n"); 
            break;
        case 2:       //70-79
            printf("C. \n"); 
            break;
        case 3:       //80-89
            printf("B. \n");
            break;
        case 4:       //90-99
            printf("A. \n");
            break;
        default:
            printf("Say what?? \n");
            break;
        }
    return 0;
}