证明静态函数在main函数运行前就运行了

#include<iostream>
#include<stdio.h>
using namespace std;
class static_name
{
public:
static_name(){};
static int  static_print();
private:
static  int  i_static_value;
};

int static_name::static_print()
{
printf("This is static!! i_static_value = %d\n", i_static_value);
return 1;
}
int static_name::i_static_value = static_name::static_print();

int main()
{
printf("This is main_function()!!\n");

return 0;

}