Use the result of a function as a variable to another one

[atzounis]

Hello all,
So here is my problem:

I have 2 functions that one uses the other's calculations and result:

int functionA(int a, int b) {
int x = a+b;
return x;
}
int functionB(int a, int b, int c) {
int xx = x(a,b);
int f = xx * c;
return f;
}

I have reached a point in a program I am trying to write, where I need functions that take too many parameters and I was thinking whether or not there is a better way to do it, like calling the function A or its result directly without having to insert it parameters as parameters to funciton B and so on...
Thank you all.

[Ancient Dragon]

You could use global variables, that that is normally fround upon because it can lead to bugs and errors.

you sould nest the functions like this: functionB(a,b,FunctionA(a,b));

[L7Sqr]

In addition to what Ancient Dragon points out, if you are to the point where the number of arguments is cumbersome you may want to look into a refactor - possibly using structs to pass around common data.

[richieking]

lambda is also another way out. consider looking into that.
I personally like lambda when it comes to what you are requesting. Clean and mmm simple. That is depends on your knowledge with cpp11.

[NathanOliver]

Taking the code that you have and changing it a little bit you can make it look like this:

int functionA(int a, int b) 
{
    return a + b;
}

int functionB(int a, int b, int c) 
{
    return c * x(a, b);
}