如何从 while 循环中添加数字

How can I add numbers from a while loop?

本文关键字：添加 数字 循环 while      更新时间：2023-10-16

代码输出单独的行，但我希望它将所有行加在一起。

示例测试数据文件：

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输出为：

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

我怎么能只有一行平均字母数和一行总数字？

#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;
}
这是我清理

代码的努力。这真的是一个在正确的时间做正确的事情的问题。你需要考虑什么应该在循环内部，什么应该在外面。例如，很明显，如果您尝试汇总字母数，则在循环内将字母数设置为零是错误的。

#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，我还没有实际测试上面的代码。

此代码可以通过仅使用一个while循环来简化。行数未计算在内。使用if (current == 'n') linecount++;计算行数。

目前，"!!!"被视为3句话。检查前一个字符以正确识别句子的结尾。

#include <iostream>
#include <sstream>
using namespace std;
int main()
{
    int letters = 0;
    int digits = 0;
    int sentences = 0;
    stringstream source;
    source << "!!!Abc def 1 2 3 100. Sentence 2.";
    char current;
    char previous = 0;
    while(source.get(current))
    {
        if(isalnum(previous) && (current == '.' || current == '!' || current == '?'))
            sentences++;
        else if(isalpha(current))
            letters++;
        else if(isdigit(current))
            digits++;
        previous = current;
    }
    cout << "digits " << digits << endl;
    cout << "letters " << letters << endl;
    cout << "sentences " << sentences << endl;
    cout << "total average " << (float)letters/sentences << endl;
    return 0;
}

请注意，当c是!?.之一时，isalpha(c)将返回零

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