#include <stdio.h>
static int internalVar = 20;
void printInternalVar(){
printf("internalVar : %d\n", internalVar);
}
void modifyInternalVar(int value){
internalVar = value;
}
/*
int main(){
printf("main_internalVar : %d\n", internalVar);
internalVar = 300;
printf("main_internalVar : %d\n", internalVar);
return 0;
}
*/
#include <stdio.h>
// extern in internalVar;
extern void printInternalVar();
extern void modifyInternalVar(int value);
int main(){
printInternalVar();
modifyInternalVar(50);
printInternalVar();
return 0;
}