Xtykutl

This code is a part of my main code , in this part, each product code that user enter , the quantity and total price will increase, at the end, the user return totalSum, quantity1,quantity2,quantity3,quantity4 to main function,then proceed to print receipt , I know to return to main function have to do like this z= getTotalSum(). but how for multi return? (currently I put as 0 because I don't know how to put)

#include <stdio.h>

int getTotalSum (void); // when user selected product will calculate sum,quantity of each product

int main ()

{

getTotalSum();

return 0;

}

int getTotalSum (void)

{

int code;

float sum=0,totalSum,quantity1=0,quantity2=0,quantity3=0,quantity4=0;

while(1)

{   

    printf("Enter a product code.(Enter 5 to get total sum)n");

    scanf("%d",&code);



    switch(code)

    {

    case 1:

        {

        quantity1=( quantity1 + 1);

        sum=( 45.20 + sum);

        printf("Current Sum: RM%.2fn",sum);

        break;

        }

    case 2:

        {

        quantity2=( quantity2 + 1);

        sum=(14.50 + sum);

        printf("Current Sum: RM%.2fn",sum);

        break;

        }

    case 3:

        {

        quantity3=( quantity3 + 1);

        sum=(3.45 + sum);

        printf("Current Sum: RM%.2fn",sum);

        break;

        }

    case 4:

        {

        quantity4=( quantity4 + 1);

        sum=(7.80 + sum);

        printf("Current Sum: RM%.2fn",sum);

        break;

        }

    case 5:

        totalSum= sum;

        printf("+--------------+--------------------+----------+n");

        printf("| Product Code | Rentail Price (RM) | Quantity |n");

        printf("+--------------+--------------------+----------+n");

        printf("| 1            | 45.20              | %.f        |n",quantity1);

        printf("+--------------+--------------------+----------+n");

        printf("| 2            | 14.50              | %.f        |n",quantity2);

        printf("+--------------+--------------------+----------+n");

        printf("| 3            |  3.45              | %.f        |n",quantity3);

        printf("+--------------+--------------------+----------+n");

        printf("| 4            |  7.80              | %.f        |n",quantity4);

        printf("+--------------+--------------------+----------+n");

        printf("Total Sum: RM%.2fn",totalSum); 

        return 0;

    }

    }

}

There are several methods you may employ to return multiple values:

1. 
   return a struct
   


2. Write to several variables passed to function by address


3. Write to struct passed to function by address


4. Write to an array passed to function

An example of each follows:

1

struct data

{

    int one;

    int two;

    int three;

    int four;

};



struct data getTotalSum(void)

{

    ...

}

2

void getTotalSum(int *one, int *two, int *three, int *four)

{

    ...

}

3

struct data

{

    int one;

    int two;

    int three;

    int four;

};



void getTotalSum(struct data *d)

{

    ...

}

4

void getTotalSum(int *array)

{

   ...

}