c++ - 如何从 while 循环中添加数字？

Question

代码输出单独的行，但我希望它把所有行加在一起。

示例测试数据文件:

Iris Pruysen 在 2014 年田径残奥会上的表现

艾里斯·普鲁伊森 (Iris Pruysen) 是一名装有假腿的运动员，他在法国巴黎塞巴斯蒂安·查理蒂体育场举行的 2014 年残奥会田径比赛中参加跳远比赛。今天是 2017 年 7 月 27 日。

输出是:

Average number of letters per sentence 163.000  
Total number of digits is 8  
Average number of letters per sentence 5.000  
Total number of digits is 6

我怎样才能只用一行表示平均字母数和一行表示总数字？

#include <iostream>
#include <iomanip>
#include <cmath>
#include <cctype>
using namespace std;
int main()
{
  int letters; //Total number of letters                                                                                                                                           
  int digits; //Total number of digits                                                                                                                                             
  double sentencecount; //Number of sentences                                                                                                                                      
  float averageletters; //Average number of letters per sentence                                                                                                                   
  int linecount=0; //Count of lines                                                                                                                                                
  char current; //Current character                                                                                                                                                                                                           
  cout << fixed << setprecision(3);
  cin.get(current);
  while (cin) //while receiving input                                                                                                                                              
    {
      digits = 0;
      letters = 0;
      linecount++;
      while (current != '.' && current != '!' && current != '?')        //checks each line                                                                                         
        {
          if (isalpha(current))//counts alphabet characters                                                                                                                        
            letters++;
          if (isdigit(current))//counts digits                                                                                                                                     
            digits++;
          cin.get (current);
        }
      sentencecount = letters/linecount;//finds average letters per sentence                                                                                                       
      cin.get (current);
      cout << "Average number of letters per sentence " << sentencecount << endl << "Total number of digits is " <<  digits << endl;
    }
  //  cout << "Average number of letters per sentence " << sentencecount << endl << "Total number of digits is " <<  digits << endl;                                               
  return 0;
}

Answer 1

这是我清理代码的成果。这真的是在正确的时间做正确的事情。您需要考虑什么应该在循环内，什么应该在循环外。例如，很明显，如果您尝试计算字母总数，将字母数设置为零是错误的在循环内。

#include <iostream>
#include <iomanip>
#include <cmath>
#include <cctype>
using namespace std;
int main()
{
  int letters = 0; // Total number of letters                                                                                                                                           
  int digits = 0; // Total number of digits                                                                                                                                             
  double sentencecount; // Number of sentences                                                                                                                                      
  float averageletters; // Average number of letters per sentence                                                                                                                   
  int linecount=0; // Count of lines                                                                                                                                                
  char current; // Current character                                                                                                                                                                                                           
  cout << fixed << setprecision(3);
  cin.get(current);
  while (cin) // While receiving input                                                                                                                                              
  {
    linecount++;
    while (current != '.' && current != '!' && current != '?') // Checks each line                                                                                         
    {
        if (isalpha(current)) // Counts alphabet characters                                                                                                                        
          letters++;
        if (isdigit(current)) // Counts digits                                                                                                                                     
          digits++;
        cin.get (current);
    }

    cin.get (current);
  }
  sentencecount = letters/linecount; // Finds average letters per sentence                   
  cout << "Average number of letters per sentence " << sentencecount << endl
       << "Total number of digits is " << digits << endl;                                               
  return 0;
}

免责声明，我实际上没有测试过上面的代码。