function problems

[Josh Carswell]

I am attempting to use functions but keep getting errors any help would be great

#include <stdio.h>
#include <stdlib.h>
#define TAX 0.05

int main()
{
    totalCalc();
    system("pause");
    return 0;
}

void totalCalc(void)
{
    float tax, value, total;

    printf("Please enter the subtotal: ");
    scanf("%f", &value);
    tax = taxCalc(value);
    total = tax + value;
    printf("Subtotal  %.2f", value);
    printf("tax total %.2f", tax);
    printf("Total     %.2f", total);
    
}

float taxCalc(float subtotal)
{
    float output, tax2;
    
    fflush(stdin);
    printf("Please enter the Tax rate [%1.2f]: ", TAX);
    if ((scanf("%c")) == '\n')
    {
        output = subtotal * TAX;
    } else
    {
        scanf("%f", &tax2);
        output = subtotal * tax2;
    }
    
    return output;
}

The errors that I am getting are

13 H:\Desktop\testmultifunc.c conflicting types for 'totalCalc'
7 H:\Desktop\testmultifunc.c previous implicit declaration of 'totalCalc' was here
27 H:\Desktop\testmultifunc.c conflicting types for 'taxCalc'
18 H:\Desktop\testmultifunc.c previous implicit declaration of 'taxCalc' was here

[alex9]

I think you need to declare those functions before int main() function, something like this:

void totalCalc(void);
float taxCalc(float subtotal);
...
...
int main()
{
..

[quirkyusername]

This can't possibly be all of your source code can it? TotalCalc is never declared before it is used on line 7, unless maybe you're just using a slightly crappy compiler because those error messages are quite difficult to decipher when compared to the actual problem

[Josh Carswell]

Thanks alex9 that seemed to sort it out. Oh and quirkyusername ya this is all of my source code I was just gettin used to usin func's.