A dumb loop problem

Hi everyone;

My homework is this.A Bookseller makes special discount for multiple orders of a book as follows: AMOUNT and DISCOUNT as follows.5-9 5% 10-14 10% 15-19 15% 20+ 20% Write a C main function to read the amount of order from the standardinput and compute and print the total price of the given order after thediscount. Assume that unit price of a book is 10.00$








my problem is that.When i start with this

Code:

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 #include<stdio.h>
    #include <stdlib.h>
   
    int main(void)
   
    {
        int number;
        float TotalPrice;
        printf("enter a number:");
       
        scanf("%d",&number);
       
        if(number<=5) {
                      printf("Your Total Price is :%d", TotalPrice);
                      TotalPrice=number*10;
                     
                   
                        system("PAUSE");
              return 0;
              }}

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i get 0 if i enter a number between 0 and 4(0 and 4 included)

i dont know where im doing a mistake.
i also want to know if i can handle this buy just if statements.
or how can i do it by while and for loops ?

Thank you.

Code:

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printf("Your Total Price is :%d", TotalPrice);

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You're using the wrong fotmat to print a float %d is for integers
And then you should calculate TotalPrice before printing it's value.
Kurt