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#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>
//외부 파일에서 내부 연결 변수를 직접 참조할 수 없음
//extern int internalVar; //이렇게 하면 링크 오류 발생
extern void printInternalVar();
extern void modifyInternalVar(int value);
int main() {
printInternalVar();
modifyInternalVar(50);
printInternalVar();
return 0;
}
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