C语言：外部函数

//main.c#include stdio.hextern void func();extern int m;int n = 200;int main(){func();printf(m = %d, n = %d\n, m, n);getchar();//return 0;}//module.c#include stdio.hint m = 100;void fun...

//main.c
#include <stdio.h>
extern void func();
extern int m;
int n = 200;
int main(){
    func();
    printf("m = %d, n = %d\n", m, n);
    getchar();
    //return 0;
}

//module.c
#include <stdio.h>
int m = 100;
void func(){
    printf("Multiple file programming!\n");
}