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#include <stdio.h>
 
#include<stdlib.h>
 
 
int getinput();
float calcDiscount(int utilities,float amountpay,int typebill);
void calcTotalpaid(float amountpay ,float discount,float *totaldiscount, float *totalpaid);
void display(float totalpaid);
 
int main() 
{
    int counter=1;
    float totalpaid;
    while (counter!=0)
    {
        int typebill,utilities,internet;
        float amountpay = 0,totaldiscount,discount;
        typebill=getinput();
 
        if (typebill==1)
        {
            printf("Enter 1=TNB or 2=SYABAS : ");
            scanf("%d",&utilities);
        }
        else if(typebill==2)
        {
            printf("Enter 1=DIGI 2=UNIFI or 3=MAXIS FIBRE:");
            scanf("%d", &internet);
        }
 
        fflush(stdin);
        printf("\nEnter amount to pay : ");
        scanf(" %f",&amountpay);
 
        discount= calcDiscount( utilities, amountpay, typebill);
        calcTotalpaid(amountpay ,discount,&totaldiscount,&totalpaid);
        printf("\nTotal after discount = RM%.2f",totaldiscount);
        printf("\nContinue? 1=yes, 0=no: ");
        scanf("%d", &counter);
    }
        display(totalpaid);
 
 
 
return 0;
}
 
int getinput()
{
    int typebill;
    printf("\nEnter bill type (1=utilities, 2=internet): ");
    scanf("%d",&typebill);
    return typebill;
}
 
float calcDiscount(int utilities,float amountpay,int typebill)
{
 
 
    float discount;
    int internet;
 
    if (typebill==1)
    {
        if (utilities==1)
        {
            discount=0.05;
        }
        else
        {
            discount=0.1;
        }
    }
    else
    {
        if (typebill==2)
        {
            if (internet==1)
            {
                discount=0.05;
            }
            else if (internet==2)
            {
               discount=0.05;
            }
            else
            {
                discount=0.05;
            }
        }
    }
 return discount;
}
 
void calcTotalpaid(float amountpay ,float discount,float *totaldiscount, float *totalpaid)
{
    *totaldiscount= amountpay*(1-discount);
 
    *totalpaid= *totalpaid + *totaldiscount;
}
 
void display(float totalpaid)
{
    printf("\nTotal paid : RM %.2f", totalpaid);
    printf("\nThank You for using TickNGo");
}