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How to do integer -> string conversion has been answered many times on the internet... however, I'm looking for the most compact "C++-way" to do this.
Since you're able to concatenate strings using the overloaded + operator, it would be preferable to be able to do something along the lines of the python-ish x = (stringVariable + str(intVariable)) concatenation, but I don't know if there's a canonical way to do this in C++.
The most common solutions I see are:
stringstream: If possible, it would be nice not to have 3 lines of code (declaration, writing to the stream, conversion to string) just to concatenate some letters and numbers.
itoa: this works, but I'm looking for a canonical C++ solution. Also, I think itoa is technically non-standard although I could be wrong.
boost format / boost lexical cast: this works too, but is there nothing in vanilla C++ that does the job?
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The easiest way to convert int to String is very simple. Just add to int or Integer an empty string "" and you'll get your int as a String. It happens because adding int and String gives you a new String. That means if you have int x = 5 , just define x + "" and you'll get your new String.
The simplest way of converting int to string is using std::to_string(n). It takes the integer variable or value to be converted into a string as its argument. Other than this, we can also use a stringstream class or a lexical_cast operator for int to string conversion.
Concatenation is the process of appending one string to the end of another string. You concatenate strings by using the + operator. For string literals and string constants, concatenation occurs at compile time; no run-time concatenation occurs. For string variables, concatenation occurs only at run time.
C++ has a built-in method to concatenate strings. The strcat() method is used to concatenate strings in C++. The strcat() function takes char array as input and then concatenates the input values passed to the function.
#include <string>
String to integer: int n = std::stoi(s);
Integer to string: std::string s = std::to_string(n);
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