CODEWITHSUNDEEP
c++string
KostasKol
KostasKol

Reputation: 111

Converting int to string and adding to an existin string in c++

I was wondering how I could convert an int to a string and then add it to an existin string. i.e.

std::string s = "Hello";
//convert 1 to string here
//add the string 1 to s

I hope I'm making sense. Thank you very much in advance for any answer.

Upvotes: 1

Views: 59

Answers (2)

Bathsheba
Bathsheba

Reputation: 234665

The "modern" way is to use std::to_string(1). In fact, various overloads of std::to_string exist for different number types.

Putting this together you can write std::string s = "Hello" + std::to_string(1);

Alternatively you can use std::stringstream which can be faster due to fewer string concatenation operations which can be expensive:

std::stringstream s;
s << "Hello" << 1;
// s.str() extracts the string

Upvotes: 2

Some programmer dude
Some programmer dude

Reputation: 409166

If the number you want to append is an integer or floating point variable, then use std::to_string and simply "add" it:

int some_number = 123;
std::string some_string = "foo";

some_string += std::to_string(some_number);

std::cout << some_string << '\n';

Should output

foo123

Upvotes: 3

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