Convert int array to a string in C++

This post will discuss how to convert an int array to a string in C++.

1. Using `to_string()` function

The idea is to iterate over the array using a for-loop and concatenate all values in an array to a std::string. This can be done using the std::to_string function, which returns the string representation of an integer. This can be implemented as follows:

#include <iostream>

#include <string>

std::string convert(int arr[], int n) {

std::string s;

for (int i = 0; i < n; i++) {

s += std::to_string(arr[i]);

}

return s;

}

int main()

{

int arr[] = {0, 1, 1, 0, 1, 1, 0, 0};

int n = sizeof(arr) / sizeof(*arr);

std::string s = convert(arr, n);

std::cout << s << std::endl; // 01101100

return 0;

}

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2. Using String Stream

Another option is to use the std::stringstream to concatenate integers to a string. The std::stringstream is a stream class to operate on strings. The basic idea remains the same as above, as shown below:

#include <iostream>

#include <string>

#include <sstream>

std::string convert(int arr[], int n) {

std::stringstream ss("");

for (int i = 0; i < n; i++) {

ss << arr[i];

}

return ss.str();

}