C ++通过在每个元素后面添加逗号将向量转换为CSV [英] C++ Vector to CSV by adding Comma after each element

问题描述

vector<string> v;
v.push_back("A");
v.push_back("B");
v.push_back("C");
v.push_back("D");

for (vector<int>::iterator it = v.begin(); it!=v.end(); ++it) {
//printout 
   cout << *it << endl;

}

我喜欢在每个元素后面添加逗号如下：
A，B，C，D

I like to add a comma after each element as follow: A,B,C,D

我尝试在Google上研究，但我只找到CSV vector c>。 c>

I tried researching on Google, but I only found CSV to vector.

推荐答案

/ code> loop：

You could output the commas in your for loop:

for (vector<int>::iterator it = v.begin(); it!=v.end(); ++it) {
//printout 
   cout << *it << ", " << endl;
}

或者，您可以使用 copy 算法。

Or, you could use the copy algorithm.

std::copy(v.begin(), v.end(), std::ostream_iterator<char*>(std::cout, ", "));

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