Question

我正在尝试编写一个程序来分割数字和单词。代码完成，它可以工作。我只是想知道如何在输出结束时删除逗号。

#include <iostream>
#include <string>
#include <vector>
#include <sstream>

using namespace std;
vector<string> split(string targer, string delimiter);
int main()
{
   string s, delimiter;
   vector<string> tokens;
   cout << "Enter string to spilt:" << endl;
   getline (cin,s);
   cout << "Enter delimiter string:" << endl;
   getline (cin,delimiter);

   tokens = split(s, delimiter);
   cout << "The substrings are: ";
   for(int i = 0; i < tokens.size(); i++)
   {
    cout << "\"" << tokens[i] << "\"" << "," << " ";

   }
   cout<<endl;
   return 0;
}
vector<string> split(string target, string delimiter){
 stringstream ss(target);
 string item;
 vector<string> tokens;
 while (getline(ss, item, delimiter.at(0))) {
    tokens.push_back(item);
 }
 return tokens;
}

Answer 1

您可以为其添加if条件：

for(int i = 0; i < tokens.size(); i++)
{
    if (i != 0) cout << "," << " ";
    cout << "\"" << tokens[i] << "\"";
}

或

string dlmtr = "";
for(int i = 0; i < tokens.size(); i++)
{
    cout << dlmtr << "\"" << tokens[i] << "\"";
    dlmtr = ", ";
}

Answer 2

尝试在cout循环之外输出最后一个for语句，如下所示：

以前的代码：

for(int i = 0; i < tokens.size(); i++)
   {
    cout << "\"" << tokens[i] << "\"" << "," << " ";

   }
cout<<endl;

新代码：

for(int i = 0; i < tokens.size() - 1; i++)
   {
    cout << "\"" << tokens[i] << "\"" << "," << " ";

   }
if (tokens.size() != 0)
    cout << "\"" << tokens[tokens.size() - 1] << "\"";
cout<<endl;

Answer 3

for(int i = 0; i < tokens.size(); i++)
{
     if (i > 0)
          cout << ", ";
     cout << '"' << tokens[i] << '"';
}

Answer 4

size_t i = 0;

for(; i < tokens.size() - 1; i++) {
    cout << "\"" << tokens[i] << "\"" << "," << " ";
}

if (tokens.size() - 1 >= 0 ) {
    cout << "\"" << tokens[i] << "\"";
}

Answer 5

如何使用退格\b 逃避性格？

在for循环之外，添加此ASCII字符。

如何删除输出末尾的逗号？

5 个答案: