#include<stdio.h>
int myfun()
{
        static int a = 10; 
        ++a;
        printf("fuc a is %d\n",a);
}
int main()
{
    
        static int a = 1;
        myfun();
        ++a;
        myfun();
        printf("main a is %d\n",a);
}

输出

fuc a is 11
fuc a is 12
main a is 2