如何在 C 程序的 2 个单独文件中获取具有相同名称的全局 static 变量的值

Question

I'm trying to execute a program in C. While executing I'm getting the same value for global static variables( static int data ) with the same name declared in 2 separate files program1.c and program2.c where the main() function is in program1.c The actual answer should be apple = 2 and orange = 3 but the static int data variable is getting overridden by oranges_set(3) function call. Could anyone please let me know what could be the issue? Thanks in advance.

program1.c 

#include <stdio.h>
#include "program2.c"

void apples_set(int value);
int apples_get();


static int data;

void oranges_set(int value)
{
    data = value;
}

int oranges_get()
{
    printf("Value of oranges = %d \n",data);
    return data;
}

int main(){

    apples_set(2);
    oranges_set(3);
    printf("Apple = %d and Orange = %d",apples_get(),oranges_get());
    return 0;
}

========================================================

program2.c

static int data;

void apples_set(int value)
{

    data = value;
}

int apples_get()
{
    printf("Value of apples = %d \n",data);
    return data;
}

Answer 1

These are not separate files, because you include the one in the other. This is equivalent to copying the entire content of program2.c and pasting it place of the #include "program2.c" line in program1.c .

For this to work correctly, you need to compile the files as separate object files and then link those together.