project 7

/**
 *Program Name :
 *Written By :
 */

#include <stdio.h>
#include <stdlib.h>

void DisplayClassInfo(void);
void DisplayProgramMenu(void);
int extractLargestDigitOccurrence();
int countDigits();

int main() {

    DisplayClassInfo();

    DisplayProgramMenu();

    return 0;
}

void DisplayClassInfo() {
    printf("CIS 26 - C Programming\n");
    printf("\n");
    printf("\n");
    printf("\n");
    printf("\n");
    printf("Assignment Information --\n");
    printf("  Assignment Number:  Lab 07\n");
    printf("                      Coding Assignment -- Exercise 1\n");
    printf("  Written By:         \n");
    printf("  Submitted Date:     December 11, 2011\n");
    printf("\n");
   return;
 }

void DisplayProgramMenu(){

int MenuOption;
do
{
printf("\n******************************************************\n");
printf("*                         MENU                       *\n");
printf("* 1) Calling extractLargestDigitOccurrenceYourname() *\n");
printf("* 2) Quit                                            *\n");
printf("******************************************************\n");
printf("Enter your option (1 or 2) : ");
scanf("%d", &MenuOption);

switch (MenuOption) {
            case 1:
                extractLargestDigitOccurrence();
                break;
            case 2:


                break;

            default:
                printf("\n    WRONG OPTION!\n\n");
}
} while (MenuOption != 2);
    printf("\n  Have fun ...\n");


return;
}


int countDigits(int X) {
    int NumDigits = 0;


    do {
        ++NumDigits;
        X /= 10;
    } while (X);


    return NumDigits;
}


int extractLargestDigitOccurrence() {
    int I, x, Length, Number = 0, Digit, numofInts = 0, count;
    int LargestDigit = 0, Position, Divisor = 1, size;






    printf("\n  Calling extractLargestDigit() - \n");
    printf("How many integers (must be greater than 1)? ");
    scanf("%d", &numofInts);

        /**int *px = NULL;

    px = (int*) malloc(numofInts*sizeof(int));
    *px = (numofInts + 1);
    */

    // attempting to use malloc but have no clue what im doing here


    for (count = 0; count < numofInts; count++)

    {
    printf("    Enter an integer: ");
    scanf("%d", &Number);
    }

    if (Number < 0)
        Number *= -1;


    Length = countDigits(Number);


    for (I = 1; I < Length + 1; I++) {
        Digit = (Number / Divisor) % 10;
        Divisor *= 10;
        if (Digit > LargestDigit) {
            LargestDigit = Digit;
            Position = I;
        }
    }
    printf("    The largest digit : %d\n", LargestDigit);


    printf("    Its position : %d\n", Position);

    return LargestDigit;
free (px);
px = NULL;
}