Code:
#include <stdio.h>
#include <ctype.h>
#define MAX_SCORE 100
#define MIN_SCORE 0
#define TOTAL_ASSIGNMENT_MAX_SCORE 300
void menu (void);
float take_score (void);
float final_score_calc (float x, float y, float z);
char letter_grade (float x);
float G_P_A (char x);
void info_display (void);
void print_scores (float x, char y, int z);
int main () {
//int total_assignments, midterm, final_exam, students, counter,GPA;
//int A_Count=0, B_Count=0, C_Count=0, D_Count=0, F_Count=0, total_Grade_Count;
//float final_score, total_final_score=0, A_Percentage, B_Percentage, C_Percentage, D_Percentage, F_Percentage;
menu();
return 0;
/*
total_final_score /= students;
total_Grade_Count = A_Count + B_Count + C_Count + D_Count + F_Count;
A_Percentage = (( float ) ACounter / total_Grade_Count) * 100;
B_Percentage = (( float ) BCounter / total_Grade_Count) * 100;
C_Percentage = (( float ) CCounter / total_Grade_Count) * 100;
D_Percentage = (( float ) DCounter / total_Grade_Count) * 100;
F_Percentage = (( float ) FCounter / total_Grade_Count) * 100;
printf("\nStatistical result of your class:\n\n");
printf("\n\tTotal Students Number:\t%d", students);
printf("\n\tAverage score:\t%.2f",total_final_score);
printf("\n\tTotal A grade: %d, percentage %.2f%%", A_Count, A_Percentage);
printf("\n\tTotal B grade: %d, percentage %.2f%%", B_Count, B_Percentage);
printf("\n\tTotal C grade: %d, percentage %.2f%%", C_Count, C_Percentage);
printf("\n\tTotal D grade: %d, percentage %.2f%%", D_Count, D_Percentage);
printf("\n\tTotal F grade: %d, percentage %.2f%%\n", F_Count, F_Percentage);
*/
}
void menu (void) {
char c;
float final_score, total_final_score=0, average_final_score=0, high_score=-1, low_score=101;
float A_Percentage, B_Percentage, C_Percentage, D_Percentage, F_Percentage;
char grade;
int GPA, student_counter=0, ACounter=0, BCounter=0, CCounter=0, DCounter=0, FCounter=0, total_Grade_Count=0;
total_Grade_Count = ACounter + BCounter + CCounter + DCounter + FCounter;
A_Percentage = (( float ) ACounter / total_Grade_Count) * 100;
B_Percentage = (( float ) BCounter / total_Grade_Count) * 100;
C_Percentage = (( float ) CCounter / total_Grade_Count) * 100;
D_Percentage = (( float ) DCounter / total_Grade_Count) * 100;
F_Percentage = (( float ) FCounter / total_Grade_Count) * 100;
do{
printf("A/a - Add a student's record\n");
printf("D/d - Display current statistical results\n");
printf("Q/q - Quit\n");
printf("\nPlease enter a key for one of the above options:");
c=getchar();
c=toupper(c);
switch (c) {
case 'A':
final_score = take_score();
grade = letter_grade(final_score);
GPA = G_P_A(grade);
print_scores(final_score, grade, GPA);
student_counter ++;
switch (grade) {
case 'A': ACounter++;
break;
case 'B': BCounter++;
break;
case 'C': CCounter++;
break;
case 'D': DCounter++;
break;
case 'F': FCounter++;
break;
}
total_final_score += final_score;
average_final_score = (total_final_score / student_counter);
if (final_score > high_score)
high_score = final_score;
if (final_score < low_score)
low_score = final_score;
break;
case 'D':
printf("\nStatistical result of your class:\n\n");
printf("\n\tTotal Students Number:\t%d", student_counter);
printf("\n\tAverage score:\t%.2f",average_final_score);
printf("\n\tHigh score:\t%.2f",high_score);
printf("\n\tLow score:\t%.2f",low_score);
printf("\n\tTotal A grade: %d, percentage %.2f%%", ACounter, A_Percentage);
printf("\n\tTotal B grade: %d, percentage %.2f%%", BCounter, B_Percentage);
printf("\n\tTotal C grade: %d, percentage %.2f%%", CCounter, C_Percentage);
printf("\n\tTotal D grade: %d, percentage %.2f%%", DCounter, D_Percentage);
printf("\n\tTotal F grade: %d, percentage %.2f%%\n\n", FCounter, F_Percentage);
break;
}
}while (c != 'Q');
printf("\nBye!\n\n");
}
float final_score_calc (float x, float y, float z) {
float final_score;
final_score = x /3.0* 0.3 + y * 0.3+ z* 0.4;
return final_score;
}
float take_score (void) {
float total_assignments, midterm, final_exam, final_score;
printf("\nEnter a student's total assignment, midterm and final exam scores:");
scanf("%f %f %f", &total_assignments, &midterm, &final_exam);
while (total_assignments > TOTAL_ASSIGNMENT_MAX_SCORE || total_assignments < MIN_SCORE)
{
printf("\nPlease re-enter total assignment score (0~300) :");
scanf("%f", &total_assignments);
}
while (midterm > MAX_SCORE || midterm < MIN_SCORE)
{
printf("\nPlease re-enter midterm score (0~100) :");
scanf("%f", &midterm);
}
while (final_exam > MAX_SCORE || final_exam <MIN_SCORE)
{
printf("\nPlease re-enter final exam score (0~100) :");
scanf("%f", &final_exam);
}
final_score = final_score_calc (total_assignments, midterm, final_exam);
return final_score;
}
char letter_grade (float x) {
float final_score = x;
char grade;
if (final_score >= 90)
grade='A';
else if (final_score < 90 && final_score >= 80)
grade='B';
else if (final_score < 80 && final_score >=70)
grade='C';
else if (final_score < 70 && final_score >= 60)
grade='D';
else if (final_score < 60)
grade='F';
return grade;
}
float G_P_A (char x) {
float GPA;
switch ( x ) {
case 'A': GPA = 4;
break;
case 'B': GPA = 3;
break;
case 'C': GPA = 2;
break;
case 'D': GPA = 1;
break;
case 'F': GPA = 0;
break;
}
return GPA;
}
void print_scores (float x, char y, int z) {
printf("final_score: %.2f letter grade:%c GPA:%d\n\n", x, y, z);
}
When you compile it you will probably notice that the high/low scores and the percentages need work, but I am still working on those. I should be able to figure them out, but I don't know what to do with the do-while.
