Question

This is a program that asks the user to input Shipping information about selling bikes, pretty lame. At the end when it prints out the number of bikes order, and the total cost, the numbers get screwed up. The previously entered amounts seem to be sticking in the memory. How do I fix this? If that is not the problem I would not mind being told so 🙂

#include <stdio.h>
#include <math.h>
//structure
typedef struct
{char cust_name[25];
 char add_one[20];
 char add_two[20];
 }ORDER;

 ORDER order;

int main(void){
fflush(stdin);
system ( "clear" );

 //initialize variables
 double number_ordered = 0;
 double price;
 char bike;
 char risky;
 double m = 359.95;
 double s = 279.95;
    //inputs for order
    printf("Enter Customer Information\n");
    printf("Customer Name: ");
        scanf(" %[^\n]s", &order.cust_name);

    printf("\nEnter Street Address: ");
        scanf(" %[^\n]s", &order.add_one);

    printf("\nEnter City, State, and ZIP: ");
        scanf(" %[^\n]s", &order.add_two);

    printf("\nHow Many Bicycles Are Ordered: ");
        scanf(" %d", &number_ordered);

    printf("\nWhat Type Of Bike Is Ordered\n  M Mountain Bike \n  S Street Bike");
   printf("\nChoose One (M or S): ");
       scanf(" %c", &bike);

    printf("\nIs The Customer Risky (Y/N): ");
        scanf(" %c", &risky);

    system ( "clear" );

    //print order
    printf("\n**********Shipping Instructions**********");
    printf("\nTo: %s\n    %s\n    %s", order.cust_name, order.add_one, order.add_two);

    if (bike == 'M' || bike == 'm')
        printf("\n\nShip: %d Mountain Bikes", number_ordered);
    else 
        printf("\n\nShip: %d Street Bikes", number_ordered);

    if (bike == 'M' || bike == 'm')
        price = number_ordered * m;
    else
        price = number_ordered * s;

    if (risky == 'Y' || risky == 'y')
        printf("\nBy Freight, COD %d\n", price);
    else
        printf("\nBy Freight, And Bill The Customer %d\n", price);


        printf("*****************************************\n");
        return 0;
        }

Answer 1

You are printing number_ordered and price, which are doubles, using %d. %d is only for integer types. Use %lf to printf or scanf doubles.