UVA 10137

題目連結地址  10137 - The Trip

/** 10137 - The Trip* 作者 儀冰* 語言 C++* QQ 974817955** 精度處理一小弄。n個學生，每個學生有一個花費，* 求出平均值，求小於平均值的總和（less），* 求出大於平均值的總和（greatly），最後再進行less和grealy比較，輸出最大的。*/#include <iostream>#include <cstdio>#include <cstring>using namespace std;const int SIZE = 1000;const double EXP = 1e-8;int main(){    int nStudents = 0;             //學生總數    double everyStudentCost[SIZE]; //儲存每個學生的花費    double totalCost = 0.0;        //花費總數    double average = 0.0;          //平均值    double less = 0.0;             //少於平均值    double greatly = 0.0;          //多於平均值    while (cin >> nStudents)    {        if (nStudents == 0)        {            break;        }        //初始化        totalCost = 0.0;        average = 0.0;        less = 0.0;        greatly = 0.0;        //輸入        for (int i=0; i<nStudents; i++)        {            cin >> everyStudentCost[i];        }        //求總花費        for (int i=0; i<nStudents; i++)        {            totalCost += everyStudentCost[i];        }        //求平均值        average = totalCost / nStudents;        //求less和greatly的值        for (int i=0; i<nStudents; i++)        {            if (everyStudentCost[i] < average)            {                //精度處理，保留兩位小數。先乘以100取其整數部分，然後再除以100.00                less += ((int)(100*(average - everyStudentCost[i])) / 100.00);            }            else            {                greatly += ((int)(100*(everyStudentCost[i] - average)) / 100.00);            }        }        //求出less和greatly中的最小值        if (less > greatly)        {            cout.precision(2);            cout.setf(ios::fixed | ios::showpoint);            cout << "$" << less << endl;        }        else        {            cout.precision(2);            cout.setf(ios::fixed | ios::showpoint);            cout << "$" << greatly << endl;        }    }    return 0;}