求圆的面积

#include <stdlib.h>#include <string.h>#include <iostream>using namespace std;#include "oj.h"/*功能:    输入:     输出:arrValue:存储返回的符合范围之内的圆面积，内存在函数外已经申请 nValue:返回数组的行数     返回:      */void OutputRotundityArea(float *arrValue,int &nValue){const float PI = 3.14;for (int i = 1; i <= 10; ++i){float area = PI * i *i;if (area>= 40 && area<=90){arrValue[nValue] = area;nValue ++;}}}int main(){float fResArray[10];for (int i = 0; i < 10; ++i){fResArray[i] = 0.0;}int nArrayCount = 0 ;OutputRotundityArea(fResArray, nArrayCount);cout<<nArrayCount<<endl;cout<<fResArray[0]<<""<<fResArray[1]<<endl;return 0;}