f0502.cpp

it is a usefull thing

//=====================================
// f0502.cpp
// 函数设计的随意性
//=====================================
#include<iostream>
#include<vector>
using namespace std;
//-------------------------------------
void print(vector<int>& a){
  for(int i=0; i<a.size(); ++i)
    cout<<a[i]<<" ";
  cout<<endl;
}//------------------------------------
vector<int> add(vector<int>& a, vector<int>& b){
  for(int i=0; i<a.size(); ++i)
    a[i] += b[i];              // ?
  return a;
}//------------------------------------
int main(){
  int aa[]={2,3,1,2,3,2,1}, bb[]={5,3,1,1,6,2,2};
  vector<int> a(aa,aa+7), b(bb,bb+7);
  vector<int> c = add(a, b);
  print(a);  print(b);  print(c);
}//====================================