C program:

My code isn't displaying anything when i pick a menu option choice; i took way the flush from the function userChoice but the code display the menu twice

please help

thank you

#define _CRT_SERCURE_NO_WARNINGS

#define PAUSE system("pause")

#define CLS system("cls")

#define FLUSH myFlush()

#include

#include

#include

#include

typedef struct{

char name[50];

float score1;

float score2;

float score3;

float score4;

} STUDENTS;

//Prototype Function

void addStudent(STUDENTS record[], int *count);

void classAverage(STUDENTS record[], int *count);

void displayMenu(void);

void studentRecords(STUDENTS record[], int *count);

void studentAverage(STUDENTS record[], int *count);

char userChoice(void);

void myFlush(void);

int main(){

STUDENTS *record;

int amount;

int count = 0;

char choice = 0;

printf("Enter the Size of the Array: ");

scanf("%i", &amount);

record = calloc(amount,sizeof(STUDENTS));

do{

choice = userChoice();

switch(choice){

case 'A':

addStudent(record,&count);

PAUSE;

break;

case 'B':

studentRecords(record,&count);

PAUSE;

break;

case 'C':

studentAverage(record,&count);

PAUSE;

break;

case 'D':

classAverage(record,&count);

PAUSE;

break;

case 'E':

printf("Thank YOU for using my Program");

PAUSE;

break;

default:

printf("invaild choice.....Please try Again");

PAUSE;

break;

}// End Switch

}while(choice != 'E');

}// END MAIN

void addStudent(STUDENTS record[], int *count){

CLS;

char name[20];

printf("Enter the name of student: ");

scanf("%s", name);

//copy the names//

strcpy(record[*count].name, name);

printf("Enter Student score 1 Grade: ");

scanf("%f", &record[*count].score1);

printf("Enter Student score 2 Grade: ");

scanf("%f", &record[*count].score2);

printf("Enter Student score 3 Grade: ");

scanf("%f", &record[*count].score3);

printf("Enter Student score 4 Grade: ");

scanf("%f", &record[*count].score4);

(*count)++;

}// END addStudent

void classAverage(STUDENTS record[], int *count){

CLS;

float sum = 0.0;

float classAvg;

for(int i = 0; i < *count; i++){

classAvg = (record[i].score1 + record[i].score2 + record[i].score3 + record[i].score4) / 4.0;

sum += classAvg;

}// end for loop

printf("The Class Average is: %.2f ",sum);

}// end classAverage

void displayMenu(){

CLS;

printf("Main Menu ");

printf("[A] Add a student ");

printf("{B} Display all student records ");

printf("{C} Display student average ");

printf("{D} Display class average ");

printf("{E} Quit ");

printf("Enter Your Selection : ");

}// displayMenu;

void studentRecords(STUDENTS record[], int *count){

CLS;

//loop //

for(int i = 0; i < *count; i++)

//print the all values//

printf("%s\t%.2f %.2f %.2f %.2f ", record[i].name, record[i].score1, record[i].score2, record[i].score3, record[i].score4);

}// end studentRecord

void studentAverage(STUDENTS record[], int *count){

CLS;

int i;

float average = 0.0;

printf("Student Average: ");

printf("Name\tAverage ");

for(i = 0; i < *count; i++){

// calculate the average for all four test score

average = (record[i].score1 + record[i].score2 + record[i].score3 + record[i].score4) / 4.0;

printf("%s\t%.2f ", record[i].name, average);

}// end for loop

}// end studentAverage

void myFlush() {

while (getchar() != '\0');

} // end myFlush

char userChoice(){

char result;

displayMenu();

scanf("%c", &result);

FLUSH;

return toupper(result);

}// End userChoice