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所以這個程序會計算和打印用戶輸入序列的最大值，最小值，平均值和總和。我發現的唯一問題是，當輸入一個符號時，它輸出的結果是錯誤的，但仍然「添加」它是ascii代碼的總和，搞亂了結果。另外，如果其他人的數字和字母如1361351P，它仍然讀取它。任何幫助表示讚賞。C++總和，平均值，最大值，最小值驗證問題
/** C2.cpp
* Test #2 Problem C2
* Robert Uhde
* This program calculates and prints the largest, smallest, average,
* and sum of a sequence of numbers the user enters.
*/
#include <iostream>
using namespace std;
// Extreme constants to find min/max
const double MAX = 1.7976931348623157e+308;
const double MIN = 2.2250738585072014e-308;
// Create generic variable T for prototype
template <class T>
// Prototype dataSet that with request inputs and calculate sum, average, largest and smallest numbers.
T dataSet(T &sum, T &largest, T &smallest, T avg);
int main(){
// Intro to program
cout << "This program calculates and prints the largest, smallest,"
<< endl << "average, and sum of a sequence of numbers the user enters." << endl << endl;
// defined used variables in longest double format to include as many types as possible with largest range
double avg = 0, sum = 0, max, min;
// Call dataSet which returns avg and return references
avg = dataSet(sum, max, min, avg);
// Output four variables
cout << endl << "The largest of the sequence you entered is: " << max << endl;
cout << "The smallest of the sequence you entered is: " << min << endl;
cout << "The sum of the sequence you entered is: " << sum << endl;
cout << "The average of the sequence you entered is: " << avg << endl;
system("pause");
return 0;
}
// Create generic variable T for dataSet
template <class T>
T dataSet(T &sum, T &max, T &min, T avg){
T num;
min = MAX, max = MIN;
// count number of valid numbers
int count = 0;
// Repeat this loop until ^Z
do{
cout << "Enter a sequence of numbers: (^Z to quit) ";
cin >> num;
// if valid, then increment count by 1, add to sum, find out if it's new max or min
if(cin.good() && (typeid(num) == typeid(int) || typeid(num) == typeid(double))){
count++;
if(num > max)
max = num;
sum += num;
if(num < min)
min = num;
}
// if user enters ^Z break out
else if(cin.eof())
break;
// If there is some sort of type error, print so and clear to request again
else{
cout << "Error. Try Again.\n";
cin.clear();
cin.ignore(80, '\n');
}
}while(true);
// Calculate average and then return
avg = sum/count;
return avg;
}