Thread: While loop not skipping when condition isn't met

Code:

#include <stdio.h>

void calc_duty(int, float, float, float *, float *);
void print_duty(int, int, int, float, float, float, float);


int main (void)
{
    int origin, category, quantity;
    float price, ship_price, duty;
    float tax;
    char looping;




    printf("Do you have more customs form to process(type: Y for yes, N for no)?\n"); 
    scanf("%c",&looping);
    while ((looping != 'Y') && (looping != 'N')) 
    { 
          printf("You have to  enter Y for Yes or N for No. Please try again. \n");      
        /* Discard the end of line character or other characters */ 
           scanf("%c",&looping);
    }




    while ((looping = 'Y'))
    { 
        printf("What is the origin of the goods (type: 1 for US, 2 for China, and 3 for Brazil)?\n");
        scanf("%d", &origin);
        printf("What category of goods (type: 1 for food, 2 for clothing, and 3 for wood)?\n");
        scanf("%d", &category);
        printf("What quantity of goods?\n");
        scanf("%d", &quantity);
        printf("What is the unit price?\n");
        scanf("%f", &price);


        if (origin=1)
        {
            if (category=1)
            {
                tax=0.00;
            }
            if (category=2)
            {
                tax=0.00;
            }
            if (category=3)
            {
                tax=0.05;
            }
        }
        if (origin=2)
        {
            if (category=1)
            {
                tax=0.02;
            }
            if (category=2)
            {
                tax=0.03;
            }
            if (category=3)
            {
                tax=0.04;
            }
        }
        if (origin=3)
        {
            if (category=1)
            {
                tax=0.01;
            }
            if (category=2)
            {
                tax=0.02;
            }
            if (category=3)
            {
                tax=0.08;
            }
        }


        calc_duty(quantity, price, tax, &ship_price, &duty);
        print_duty(origin, category, quantity, price, tax, ship_price, duty);


        printf("Do you have more customs form to process(type: Y for yes, N for no)?\n"); 
        scanf("%c", &looping);
        while ((looping != 'Y') && (looping != 'N')) 
        { 
          printf("You have to  enter Y for Yes or N for No. Please try again. \n");      
        /* Discard the end of line character or other characters */ 
           scanf("%c",&looping); 
        }
        
    }


    printf("You have exited the loop.\n");


}




void calc_duty(int quantity, float price, float tax, float *ship_price, float *duty)
{
    *ship_price=quantity*price;
    *duty=*ship_price*tax;
}


void print_duty(int origin, int category, int quantity, float price, float tax, float ship_price, float duty)
{
    printf("Origin    Category    Quantity    Unit Price    Shipment    Tax Rate    Duty\n");
    printf("%d        %d          %d           %0.02f       %0.02f       %0.02f      %0.02f      ", origin, category, quantity, price, tax, ship_price, duty);
}

For some reason when I get to:

Code:

printf("Do you have more customs form to process(type: Y for yes, N for no)?\n");

and put N it doesn't skip my while loop even though the condition is that looping=Y

Edit: Just to clarify; the loop that checks if looping isn't equal to Y or N works. The larger loop is the one that doesn't.