ex03-12.cpp

数据结构常用算法合集

//EX03-12.cpp
#include <iostream.h>
#include <conio.h>
const N=21;
void main()
{ float x,sum=0;
  int i;
  cout << "Enetr x=";
  cin >> x;
  for (i=3;i<=N;i+=3)
  sum += x*x;
  cout <<"sum="<<sum;
  getch();
}