2 Functions in 1 main program(Visual Studio 2013)

Question

I wanna add two variables.In my main program are 2 functions. I use Visual Studio 2013.There always appears the error C2660: 'function2': function does not accept arguments 1

 #include "stdafx.h"
 #include <stdio.h>
 #include <stdlib.h>
 double funktion1();
 double funktion2();
 int main()
 {
double c;
{
    c=funktion1();
    funktion2(); //LINE 14
}
return 0;
 }
 double funktion1()
 {
double a, b, c;
printf("Add two numbers!");
scanf_s("%lf%lf", &a, &b);
c = a + b;
return c;
 }
 double funktion2(double c)
 {

printf("\n Result: %lf", c); //LINE 29



 }

Thx for your help!

Answer 1

You use variable double c in the statement printf. At that point, you haven't assigned a value to c. That is what the warning, or error in your case, is telling you.

Update:

When you need the return value of funktion1 in funktion2, you must pass it as a parameter, e.g.

int main()
{
    double c;
    c = funktion1();
    funktion2(c);
}

/* ... */

void funktion2(double c)
{
    printf("\n Result: %lf", c); //LINE 29
}