在 main.cpp 问题中从单独的 C++ 文件调用函数

Question

I have been searching online for solutions to this rather simple problem. My goal is to call a function from a separate .cpp file in my main.cpp file. What I have found thus far has told me to define my function in a separate .cpp file (averageScore.cpp) which looks like:

void averageScore()
{
    "Blah, Blah, Blah"
}

And then declare the function as a prototype in a header file (Lesson1.h) which looks like:

#include "C:/averagescore.cpp"
void averageScore();

And finally call the function again in the main.cpp:

#include "Lesson1.h"
int main()
{
    averageScore();
    return 0;
}

I am currently a CS student and my overall objective with this method of organization and execution is to create a single project for all of the rudimentary programs we must create on a weekly basis instead of creating a new project for every single program. For reference, I am using VScode and have used the following link to help me thus far:

http://www.cplusplus.com/forum/beginner/97779/

My condolences and gratitude are extended to anyone who has taken the time to read through this and help me out!

Answer 1

To achieve what you want, you must create a header file, and declare your function there, for example:

lesson1.h

void averageScore();

In a .cpp file, you define that function and include the header you just created:

lesson1.cpp

#include "lesson1.h"

void averageScore(){
    // Do what you want in this function
}

Then you can call that function in your main.cpp by including "lesson1.h":

main.cpp

#include "lesson1.h"

int main()
{
    averageScore();
    return 0;
}