f0708.cpp

it is a usefull thing

//=====================================
// f0708.cpp
// 静态局部数据
//=====================================
#include<iostream>
using namespace std;
//-------------------------------------
void func();
int n=1;
//-------------------------------------
int main(){
  int a=0, b=-10;
  cout<<"a="<<a<<", b="<<b<<", n="<<n<<endl;
  func();
  cout<<"a="<<a<<", b="<<b<<", n="<<n<<endl;
  func();
}//------------------------------------
void func(){
  static int a=2;
  int b=5;
  a+=2, b+=5;
  n+=12;
  cout<<"a="<<a<<", b="<<b<<", n="<<n<<endl;
}//====================================